Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abc7922b922a695…

MALICIOUS

PDF

89.7 KB Created: 2021-04-04 19:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b01ebc7aff1584808d5f7dd695a5ef SHA-1: a8ffc21f7722c39adce2be372b8eeb93f94b10b7 SHA-256: 2abc7922b922a69574123a5f02ed53b31d00dc26cb3a8ec04267e4fe1b7a38b2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, flagged as a PDF link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=what+are+the+theories+of+behavior+modification
    • http://ruzopiter.iblogger.org/bamboozable_10_answers.pdf
    • http://vevapefin.sportsontheweb.net/xetonaxuje.pdf
    • https://wilepojaxuxag.weebly.com/uploads/1/3/4/6/134682450/2845716.pdf
    • http://prostotit.site/what_is_the_best_programming_language_to_create_an_app47n8b.pdf
    • http://zelumefepa.sportsontheweb.net/vasazejevarol.pdf
    • http://dojemop.mywebcommunity.org/76059481945.pdf
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/sodotabepulamo_jaxaxepepavaf.pdf
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/6315c8d6d5a348.pdf
    • http://13millions-warzone.store/kia_picanto_service_manualvc5gq.pdf
    • http://stat-index-co.com/94656373986yd9kc.pdf
    • https://rejaduwewuwuga.weebly.com/uploads/1/3/1/8/131856140/e8fb5ed27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4f6c49ad-35c2-4e1b-a50e-a4ca4816ee30.filesusr.com/ugd/a28dad_8aa2d2b908734d9897d68f62662ba23a.pdf?index=true
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_0f83896416df461dbd3adc7745ca99fa.pdf?index=true
    • http://sirerig.epizy.com/48781732105.pdf
    • https://s3.amazonaws.com/pujinit/77984061730.pdf
    • http://wumegugafetawi.rf.gd/23869955005.pdf
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_268a95e0346143b5b6acf1cd66ef9fe4.pdf?index=true
    • http://ziriboxemo.epizy.com/67740894066.pdf
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_9c9faa507cfc4805bc9380b61bd4fe1b.pdf?index=true
    • http://gofosuxubajo.epizy.com/xepopoxa.pdf
    • https://s3.amazonaws.com/wovigebi/99906807095.pdf
    • http://nununad.myartsonline.com/husky_26_gallon_air_compressor_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012039.bin
87d968ce33256454c2a4c6ab3537b64c9c45ab88f2cae98812385317cf27fba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 5444 bytes
font_01_sfnt_off000132a1.bin
b04337298914802347a0b9ae0b4d4c98f9f28b13962df0d2ba6266b1141a9a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132A1 10880 bytes

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