Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3388a91279aa03…

MALICIOUS

PDF

71.1 KB Created: 2020-12-20 07:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d6f645c891cbcc4936c508e8c86006b9 SHA-1: d2c4ab118068bf9e6d9ca6b07c57f514bb5bef96 SHA-256: fd3388a91279aa03cedab5145379f83680e70679e9ad899e6973e5ab6de3cb27
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded links suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=turn+off+autofill+chrome+html PDF link annotation
    • https://bozexiwagufib.weebly.com/uploads/1/3/4/6/134695017/nexifojila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_5fb02f036f8ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382789/normal_5fca8fc8f0b11.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/6923255.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/zomabevugeb-mavabotumozip.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/6cf25ba.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/2cd1b0a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5f963798b1157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1853ba13a450babf87a01/t/5fc6668aeaf37e3b6477617c/1606837898907/jupanikem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd486d1091525336533171/t/5fdd571042c0045a33e2d702/1608341265385/cash_app_apk_for_iphone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd52f507af9e0e16f5551b/t/5fde4ee9c18bd5077c9bc499/1608404713738/vanosikotibamox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde95ce5b7bc966055f9f1c/t/5fdea6542629b066abbc29c2/1608427092316/opodo_contact_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecf748e06c339b86966c2/t/5fd686f97fc52c20692a3ae5/1607894777913/antivirus_pro_apk_6._10._9.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd3a8a51e6b539731b098d/t/5fdd4a352baf317dc37a37b3/1608337974404/wanted_netflix_parents_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 4892 bytes
SHA-256: 96207a1a19d71f32f55e18e883780f387e3bd6ef3164aa0429066ff2a58cf828
font_01_sfnt_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 11752 bytes
SHA-256: 973776d9e150a3d0e0890d3126dce9521be3184199eefd2b5d31852b46097bb4

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