Malicious PDF — malware analysis report

Static analysis result for SHA-256 f074974b3acd3273…

MALICIOUS

PDF

84.8 KB Created: 2021-07-20 22:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ae99262a32e7fd279b9a1a8d369c518f SHA-1: ff42f4e32eb3a2b83643912958959ea4d8b98cc9 SHA-256: f074974b3acd3273fa8e53f4db0ba8d620df4df3d8e6eb3d5d81cebd74162c06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://agroanaliz.by/upload/editor/files/dozexijegazop.pdf In PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e613088251---89967356801.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/02468cdcf690dc123781c07f8e59c841/97915840687.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9648251a---48431447124.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/f7da852fbd76478325b9263664115e6f/5027415067.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/1295230616.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/xodujebubimovugape.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a24f063d57---31616495459.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/84528471013.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adb0d16aaae---zimukov.pdfIn PDF document text
    • http://rurisnet.org/images/file/luxatajuzufilipimuwivexa.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/gigil.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/196d66d16cd83cf6db285f1961a3b73a/21726315763.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a70cbb7234b1b69146a8231b58bf0ce9/watidupogi.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/69348996069.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9b6a53e9b2---89524631736.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/1082585778.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/vejotofoniwowofavireta.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/89e8f7a0f66a624f30aefa176e0eafc1/26206366789.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/58325622253.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/bepodubilexaso.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/2ef8f75eca03e6dd5323ffad8fad444b/fewidigeres.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ce5885608---nonimo.pdfIn PDF document text
    • https://ntc-container.com/upload/files/sajupumojofupogeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+power+of+not+caring+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 10732 bytes
SHA-256: 2e2f6a68c9138ce113729b417bf93742db430a2d8d2144f89d2b339c49426b66
font_02_sfnt_off000117ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 17216 bytes
SHA-256: 52500963d39abde2b28f603547b84371e94d8b6adcc872273356793288c16d37