Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1c19e04829cd9e…

MALICIOUS

PDF

68.7 KB Created: 2020-12-15 11:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 679388c227f0480ce22cec0b9999a291 SHA-1: eab66e7673c754f18ff1544f10cf049f2cf983df SHA-256: 6d1c19e04829cd9e114ca009bad39c34b7baad7bc1e58966940fb6cc415ce8a4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The heuristic firings indicate it is a malicious redirector and part of a link farm, designed to drive traffic to other sites. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded links likely serve as the primary attack vector, aiming to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=mahoning+county+auditor%2527s+office+property+search In PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/tefidasixenabi.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/31d8eed8468fe8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dinilederu/aleks_math_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b20357-3092-4ba7-9491-46e69e1fc54c/kedowajumunogeguxute.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/apc_back-_ups_xs_1300_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd25d27fc6d42cb7295ac2/1606231506510/96039144449.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585d61c8c741314514ea4/t/5fc9fb86414f5e35237e6df4/1607072649425/dinarijoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/97784420333.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ebfc418d7934ac73dcfc/t/5fcb745185bc3a28a60aaa24/1607169105646/74826780163.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2aaab9ec03672fa809a7/t/5fd145575e69960192536487/1607550299208/swamp_thing_movie_watch_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/angry_birds_space_mod_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/607860567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd6bc92-054d-476c-b8b8-9cb26c37c419/fifagobabagupatavowizog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE94 5408 bytes
SHA-256: 506aa89ee53eadccfc46e33aa49585d567bcab9d889d5004c8587ffb8c9619dc
font_01_sfnt_off0000d102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD102 10820 bytes
SHA-256: ea12057619e60ff15bb9cf3776a24e2511615e6db232e37b220ed56f7ba97240
font_02_sfnt_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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