Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed0e77935672dfa…

MALICIOUS

PDF

90.9 KB Created: 2021-08-14 09:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 69d750da354c3e710134826c968da75b SHA-1: 469f4465b5daf19e32256bfeda0fbea81eb741fd SHA-256: fed0e77935672dfacf9b3180e70d899dee1640bf8cd541f9f92bfd5f02c17be6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=office+para+windows+7+ultimate+32+bits+activador PDF link annotation
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ae02418fbec---98805977220.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/84013818893.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/juranatelugegi.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/xoseze.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/81116224330.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/70344224298.pdfIn PDF document text
    • http://laduses.nl/image/file/novudikadu.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160750c9862b83---36538930851.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c910b058c8---zixerobonadupudobarewuvol.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/27837455309.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/82575431583.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/34172430338.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/57260538112.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608906fc378bc---81849110098.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/f2bc9a36f3d906baa1ebbbea88a34051/divuxovegudosasubanur.pdfIn PDF document text
    • http://polkovnik.su/upload/file/sifufamogukopetu.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/25935567677.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096b2d4a22ac---30646846277.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b549323b21c---79396159265.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/dutuwuzoxesil.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d9c1f8f4---71272370442.pdfIn PDF document text
    • https://botroul.be/uploads/vulanegesokeza.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 11540 bytes
SHA-256: f199bc5494ed225e57d415305884179db56ee631020fbd8bb88c85984fb4f65e
font_01_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 18196 bytes
SHA-256: 513d77c64971640a63bd76a64ea97c67d0315a0ab5bf75a56cbd4f11896c799b
font_02_sfnt_off000143cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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