Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbcb20fcdf9f68b…

MALICIOUS

PDF

75.7 KB Created: 2020-12-17 20:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f3e7c14d0047b209f6e15c6558a7fd5b SHA-1: c4a4f1162f4943f1381f5f5004fb9a45625ccff1 SHA-256: 4dbcb20fcdf9f68b293bc619fd34b2c4baf9a65b5baf2c607e475cc5a0bd70bd
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or malware distribution vector. It contains a large number of embedded links, including one pointing to known malicious redirector infrastructure at `traffmen.ru`. The presence of a link farm suggests an attempt to manipulate search engine results or distribute payloads through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=mandatory+reporting+laws+california In PDF document text
    • https://torififaw.weebly.com/uploads/1/3/4/6/134690130/xumafule_mugin_tusofogakexene_gilowawuzixanet.pdfIn PDF document text
    • https://mefanajumajadip.weebly.com/uploads/1/3/1/6/131637152/mezoja.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/zidosozawok/kumoxezexirojamizenuko.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/28035412339.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc728d4c43b171198891597/t/5fce20a71e1a4d7de1531653/1607344296182/sisavexur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5ade9d79364840856e8b/1606376159218/76756297800.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/33137970522.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/twitch_guide_pro_builds.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ba1840f1034a5cb4c0bb/t/5fc9a5ed87b36f46d4fae659/1607050735024/vitasezufanet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5175d8787e8798986e946/t/5fc6b30c7acac6192ab088cc/1606857487752/34219376601.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/autodesk_viewer_2018_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf12cf3de5e49b52957c1/1606283565742/jedi_academy_fighting_styles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd08c0b7ee8e70759ffab8/1606224065329/48060866636.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/nanomaterials_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/daily_language_review_answer_key_grade_7.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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 5520 bytes
SHA-256: 898a4cadb306a02c348d2d3ac4d3fce9fe60785823e8699c91b729e1f9a0d679
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10312 bytes
SHA-256: d64d210f59987982730e461c477f073ed2e297cbe72c4fad63ffc6042ed247ac

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