Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7927f4526014685…

MALICIOUS

PDF

71.5 KB Created: 2021-05-06 09:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 33fd6d2b02dbe1042ca14b5ca9ad0ec6 SHA-1: fa72ab2d63a348b10d99733f857b41a02f9fc561 SHA-256: d7927f45260146854f368ea5eed6722a9a7e7e647c55938fc447df473945f5ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to movie titles, likely serving as a pretext to entice clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=ahista+ahista+movie++hd PDF link annotation
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6819430ee---wibowuvowebedigineposasi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/2935jdbt10npci9h462q3k75h2/237694751.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/567dbc410a1fe42a75a236c5cc58ed20/kavilosivebigojativew.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/p198dpp1alfge0c5ebhrh1loj3/24776345027.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/vageraniwilerivep.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/8590a2b8af35d2c0f56e84f94f2de394/79628558633.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/67e1db0c6bd7f96e20aaebe0ed2292f5/72921666495.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/a637ad25f10761a025e54a8dc73dcfc3/37970086865.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081a5fae0b01---nusiwamodikafonasebog.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/7b5c64b5d9e185514e2c2c10e4c09a78/7004078917.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2b6982be---jasonokinubevoguluwujan.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf26b46fd8---xazovokusesomenigaxorixe.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/318269c5e37a1839ff90160abe13837a/bowog.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/fuwaravibofiwikadav.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073fea72c1a7---45376299856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 4988 bytes
SHA-256: a6a6b3bf147ed037e46149469d997d301cebdb8b68bb4347a11f9db6716591c5
font_01_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 11488 bytes
SHA-256: 31f3ce9d91c9dbe6e8aee76f7150f35a51569c1fa84de1d73272dbdf382713af