Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9b0d0847966579…

MALICIOUS

PDF

72.0 KB Created: 2020-11-14 05:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: df0a62371f5cdf48df9d609d1335ad48 SHA-1: 9f7a9283b7c45d8c3960111e3e99aa515a12dc57 SHA-256: 3b9b0d084796657954648d3a43c9ee1fdd19bd0d8eaf1a5d1c4b0c5925019fee
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external PDFs, many of which point to redirectors and SEO link farms. The primary redirector URL, 'https://traffmen.ru/123?utm_term=glow+blogs+help', is flagged as malicious. This indicates a phishing or malware distribution scheme, likely using the document as a lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffmen.ru/123?utm_term=glow+blogs+help In PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/8161880.pdfIn PDF document text
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/ratulasigemu.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/3006855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8c341031d68.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/morinujapovuzebufude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f89ae0b8815e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d321d6-e4aa-4af8-add3-7a4ce4935b55/kuxarotosoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/74846353042.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/my_summer_car_engine_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/contemporary_society_issues_def.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/belojasexomovabatudameg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb49c58-4bd7-41fc-9885-a4132f290974/83836982289.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 5036 bytes
SHA-256: 26d389886a1bb4913c1a431048bce4f32423d2532501eafccd0985ab42985767
font_01_sfnt_off0000d9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A1 10652 bytes
SHA-256: 2dfd9edb585dc99a296a69970a38e2107ff49ddf0eeb33e6263d6343d6a2179a
font_02_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 16272 bytes
SHA-256: 66fb674b20c87355eed7acc27bb5eabbd2097eab38a538fc14a7731f38a664d2

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