Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc965b19217f1ed…

MALICIOUS

PDF

71.8 KB Created: 2020-12-22 11:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1654862698bf60152e13c2ccd6456097 SHA-1: 769bc8e858738cf88da69cb70c500d59bd5fabd4 SHA-256: fdc965b19217f1ede7df59b7b1c9ba6ad5f8d8b94d097a52d9c39b19a62d6dad
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, one of which is identified as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure for 'auto clicker free download no virus', suggesting a phishing or scam attempt. The presence of multiple links to disposable hosting and a malicious redirector indicates a high likelihood of leading users to malware or phishing sites.

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://ggtraff.ru/strik?utm_term=auto+clicker+free+download+no+virus In PDF document text
    • https://static.s123-cdn-static.com/uploads/4493198/normal_5fc5d70004225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5fbbe9b7c9696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f875719bd5f3.pdfIn PDF document text
    • https://wotakipinamiwug.weebly.com/uploads/1/3/4/6/134687545/29ae2060.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/gizejesexevok-vojuwegi.pdfIn PDF document text
    • https://sixojidolox.weebly.com/uploads/1/3/0/8/130814042/nixibeted_bujimuzuxel_bumixuxezodavo.pdfIn PDF document text
    • https://fosuzotarodaduv.weebly.com/uploads/1/3/4/3/134391180/6df33c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fe1412424ad7.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/4396276.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/zepedewutosekag.pdfIn PDF document text
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/d8ae31.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/9b0760ea-09f3-4cc9-8aae-0518abff76d8/79694646769.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18716ab79f442f22e10f3/t/5fce6b9f7ae85b53b2c86690/1607363487831/download_gogo_live_mod_apk_unlimited_coin_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2697f81c9a2a0c6baf36/1606297239682/abby_elliott_snl_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbdd66a2-d903-4f1e-8c1e-77477a7af1f3/sugepajofexerot.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_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 5220 bytes
SHA-256: 0bdfb6509ac8306e64911c097872004f3bab179a514d48d671d341985bfcbef8
font_01_sfnt_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 10332 bytes
SHA-256: 22e04f8e764ea3d04c0e63665cffe57929122b59ba4eed42fa420a399b672142

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