Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1751ea7e5a435f…

MALICIOUS

PDF

75.1 KB Created: 2021-01-22 06:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0031860710ba50e5ad30ed53b04cfe SHA-1: d329d7fff0097e279f9a14f175a0504d146f171c SHA-256: 0a1751ea7e5a435f5c4945fc31248022c8481d7a5b2e6666a6c3b7038532de21
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common technique for SEO spam or phishing. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a scam involving lottery winnings or parcel delivery, aiming to trick users into clicking malicious links. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/123?utm_term=25+pound+dog+breeds
    • https://sipesavuw.weebly.com/uploads/1/3/4/6/134697333/9db6ea.pdf
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/konafu_wixuv_zifugipekid_kojivi.pdf
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/nujajekimev-vofowulakerif.pdf
    • https://site-1175399.mozfiles.com/files/1175399/stickman_jailbreak_9_funny_escape_simulations.pdf
    • https://site-1177303.mozfiles.com/files/1177303/brent_oil_price_live_today.pdf
    • https://site-1197012.mozfiles.com/files/1197012/3976135086.pdf
    • https://xakewalite.weebly.com/uploads/1/3/4/8/134882175/jigumawubupeku.pdf
    • https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/debasofupafu.pdf
    • https://static.s123-cdn-static.com/uploads/4388283/normal_5ff9c4ae78399.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/megodipewukitoj/sovozelevad.pdf
    • https://s3.amazonaws.com/pajeriramal/zuburig.pdf
    • https://s3.amazonaws.com/xonaxevetaf/54137063753.pdf
    • https://s3.amazonaws.com/ximupuv/tudukevovenujufusawasede.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95e.bin
71d30308023c4a417302b9593bb19e8c49b429d23ae5025c473f8406e8dabdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95E 5184 bytes
font_01_sfnt_off0000fb0f.bin
ca47fdd56223ac3c01d5e9ef8c7ecf499aa58cd0929d05e9eab84bae238c26be
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 10660 bytes