Malicious PDF — malware analysis report

Static analysis result for SHA-256 94341f70b9a4e2b5…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 15:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa4e833b772a78c5d8410ebc0839f97a SHA-1: da27d9cce855bdd459be50c1a7a00b25b20af6a9 SHA-256: 94341f70b9a4e2b5723b3c9e399f119573c0b1a9e1f31294af29844d8d06ed43
156 Risk Score

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 0.9992

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://jottigo.ru/award?keyword=sap+bpc+guide+pdf PDF link annotation
    • http://namsinc.info/4216181367079d5i.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/8E66jiI/zikoxuvuti.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/lezukan-mofitoluzosub-roxexolel.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisaxozof/9ejgehj/godexamubajitot.pdfIn PDF document text
    • http://hdvideo.design/9182534980eflq2.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/eBhjhck/learn_spanish_espanol_apk.pdfIn PDF document text
    • http://doucheapp.xyz/81809252844ctpnl.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/1744892.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/9753653.pdfIn PDF document text
    • https://jumomemokipus.weebly.com/uploads/1/3/0/8/130874307/6906332.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/esjjfjc/xilodofoxugisarepavorejim.pdfIn PDF document text
    • http://betmoy57.com/iphone_users_vs_android_users_studyam2rx.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/f0318b7.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/ef229055fc1.pdfIn PDF document text
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/bafigepupu.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/wizedumi/champcash_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/cushion_walk_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/chronic_pain_management_guidelines_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/ibm_corporate_responsibility_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/82411070332.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_f019f86bd6984372b59c1df189a57001.pdf?index=trueIn PDF document text
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_b441a575af3c43b6a16c5cb961eeeb0a.pdf?index=trueIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_4c2457257c914606a59a4a3c83ce514b.pdf?index=trueIn 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_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 5260 bytes
SHA-256: 82582b97b81005661cdb8beb96088c5b25d412279fc1a153772e1ed70ae67694
font_01_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 11172 bytes
SHA-256: a032d36657658eae520072b85c21e2599f3a42893b79d675ed7dba081c5f1292

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