Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a599677d94c81f…

MALICIOUS

PDF

72.7 KB Created: 2020-12-15 10:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6cd8fa8aebc017840412ae07e3178fea SHA-1: 91f0886ed3c45e8b3a2ca68e6fab55e6cb453f53 SHA-256: 87a599677d94c81f55d7e85ba6250a4599d66cc74dc204194f6a0f2645094358
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/strik?utm_term=what+is+the+periodic+law+according+to+mendeleev PDF link annotation
    • https://gowoxavakuf.weebly.com/uploads/1/3/4/7/134702457/59d969.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/vesus.pdfIn PDF document text
    • https://wafulerafi.weebly.com/uploads/1/3/4/5/134503758/5a6e57a2.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/7ea68c6d-a07a-4f9f-b9bc-d38b0c0752b3/jeporu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe60907acac6192a906040/1606312083931/what_is_pepega.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b9cab79f442f22a6952/t/5fc3c8059b1ed0353850b169/1606666245467/mobo_player_pro_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd18111f6a419847f67ca/t/5fcab330a400d748f5c3cc11/1607119665712/shadow_death_stickman_fight_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/dubofatugufipaseviri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc524a22e537a05ef248c5e/t/5fcf829aba7003536eaded04/1607434907532/suguvanakaterafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe9d5687f52b6b7c161f/t/5fc15634a97599144e29517b/1606506040635/kenwood_firmware_update.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14d850a2757459be59ac6/t/5fcd7cfe5d2e6f3bda534b5d/1607302398712/chuchel_2._0._15_apk.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5652 bytes
SHA-256: d9e0cfb7f4c99a03e6ba413c5281bf39c96601c8191d48228d63e73df4e4dc5d
font_01_sfnt_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 11688 bytes
SHA-256: 2c7b170ce5b08199e5e482a67eedb424e1f7d6f21c19502b9b33d9519a8d94cf

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