Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06994978641e476…

MALICIOUS

PDF

81.4 KB Created: 2021-09-09 13:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8bd9b9460f6a5baa66847631749213eb SHA-1: 0c18fc7cf10295468a6b087c87a03c2a13520844 SHA-256: f06994978641e4765e5c8f3b2e71493686427c01ec4b758c66c4214157e42e1c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to potentially malicious content. The presence of a 'Password-protected archive handoff' heuristic strongly suggests an attempt to conceal a payload, likely a second-stage downloader or exploit, which is then intended to be decrypted by the user. The document's structure and embedded URLs point towards an effort to disguise malicious activity as legitimate content, aiming to bypass security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://smidgel.ru/uplcv?utm_term=remove+password+from+pdf+acrobat+reader PDF link annotation
    • https://www.babetravelling.com/ckfinder/userfiles2/files/55538620496.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/gonuwuwu.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/waropukadume.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/cde93b9b4e1c1a103c443b7236eecfa9/xedivuji.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/vimagamawagesatibukime.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/6ada6484501b9f3ec2acdf88445bd54d/60381888294.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/dalolaxejapipaxa.pdfIn PDF document text
    • https://asi-filter.pl/files/file/wadav.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/66429716774.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/19858227561.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/miworiresolidazaletebugaw.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e5a61930a---26178191668.pdfIn PDF document text
    • http://talleresjpg.es/img/file/97249230123.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/katogojefixagolijorigopem.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/pixesegudip.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907150549425920.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/duvanowajibot.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/musopu.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/padisobasasodeji.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/94237785254.pdfIn PDF document text
    • http://schokobrunnen.com/idata/54590147508.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_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 10876 bytes
SHA-256: 34810de81ce7ec4dc24b76f785c711f7bc53e16f0809326207011e1af884ebed
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 17208 bytes
SHA-256: 339fd356df84c11019c41342d56546dd35f207b52be0640c2a68210e290cb7af
font_02_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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