Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2de6833413d4d9…

MALICIOUS

PDF

77.9 KB Created: 2021-01-11 06:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 149c45fc497c1b3c60e322005af9e1f5 SHA-1: e7c89349429a8510d413d61b48cd079b4d0136d1 SHA-256: 7c2de6833413d4d969ce709057b1f6e26b1f23c589a9fcd4402b72344aaf1f38
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=tap+tap+revenge+3+apk+full+version In PDF document text
    • https://bonubowagadeki.weebly.com/uploads/1/3/4/5/134506782/c6554a427c9379.pdfIn PDF document text
    • https://ralikinu.weebly.com/uploads/1/3/4/8/134883141/wuvolak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fde5dce38aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_5fb4f29b8a24e.pdfIn PDF document text
    • https://zukifetev.weebly.com/uploads/1/3/4/7/134725253/simuresofuluxov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fad8e1b5c861.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/3b734f.pdfIn PDF document text
    • https://bogujodoj.weebly.com/uploads/1/3/4/8/134881838/866482.pdfIn PDF document text
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/wokibabakaku-wepumidije-kaxotifa-jubikas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fb3d6e49a1ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/wolavuxudurakiniv.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/leruk.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 5308 bytes
SHA-256: 94be96f2a42b63231b30f6a7939047069058090acb03bc36a5cacafb9fd75b13
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 10952 bytes
SHA-256: d33c29a9c31121ddf5127b2cfc83085cc1101ba65b98dd3157dee397b78594a9
font_02_sfnt_off00011538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11538 16212 bytes
SHA-256: 1ee85d9b2018e03fb2545c7bdfd18aab3c4871b38cdebbbadf2790f840b53384

Open this report in the interactive analyzer, or submit your own file for analysis.