Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dc8290d4f42e71…

MALICIOUS

PDF

96.7 KB Created: 2021-08-08 05:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64b9ee824478a62f686a005316f048b4 SHA-1: 906749e097434fa50b19161c41742fded7bd3a0d SHA-256: f1dc8290d4f42e71e6418aecd5d9e3251460e5ab4554f6caf67a2079216029c9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with known phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ns5sdulkskeb0rtb6u607h3fsf/fuzozoredeni.pdf In PDF document text
    • http://portalcom-b2b.es/img/user///file/_0956451001624170997.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0dfab2c7---riguropag.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba1d2048b---tuxew.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/zipopit.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608393e9629ba---buxudukixovemexameri.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b0a519cbbb0---duzub.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/88509717190.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/54654651412.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8b54d0990b1248f41bb16ce267e7706e/81415754077.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/saxaxodazeziduter.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/03c26b0565727148229b1679f3e23cc3/vamalemovo.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/88448034719.pdfIn PDF document text
    • http://iphysiology.ru/upload/32972457467.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/34599242680.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/31281198451.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/lejojad.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2f12ee11c---43887399803.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1308207dc9b79a40761866c1c6803188/93833458940.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/18hiu4chirvha3cla313daif6b/32617805140.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/rufavizezevo.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/vogekib.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/tijepufaw.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c41bd48224---juxigijakojigazawi.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/60520695911.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607695d42a1f7---83688930928.pdfIn PDF document text
    • http://haki.vn/uploads/files/24876774518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dragon+ball+super+broly+espa%C3%B1ol+facebookPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 11116 bytes
SHA-256: cbcb5cdcc5bbf25bac12f5d04754ea66d5cc9dd7d5947a8e7eba2fddb7ebf9be
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 18800 bytes
SHA-256: 1afbdfa1df6304e44216b748c46f3499ba8ddbec3cd060cc7958d3d86f03b5df
font_02_sfnt_off00013a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0F 16304 bytes
SHA-256: 72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee
font_03_sfnt_off00014ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFA 1952 bytes
SHA-256: 9c70fcc3b6c16405d2ec8fdc175ba1a8a7ffba95f5ec0bf585b6073b724099b2
font_04_sfnt_off0001590b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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