Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bf68eba4101bdb…

MALICIOUS

PDF

72.0 KB Created: 2021-03-31 07:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5147006811c984e74328b973f735c5d SHA-1: 7eab78e6bf97f3e95acd11fa51ca2efb54b66f76 SHA-256: 68bf68eba4101bdbf8a920f0c6f5ef1ba1765e497c01d33dce71cd5156edc327
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to direct users to potentially harmful websites. The primary URL identified is 'https://vilenefex.ru/aws?utm_term=do+lawn+tractor+tires+have+tubes', which appears to be a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/aws?utm_term=do+lawn+tractor+tires+have+tubes
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/xofugidajozep-tuwibowewof.pdf
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/lixaruderoluz.pdf
    • https://busonuvawariba.weebly.com/uploads/1/3/4/3/134355681/210800.pdf
    • https://cdn-cms.f-static.net/uploads/4377101/normal_600d7090b8a16.pdf
    • https://cdn-cms.f-static.net/uploads/4447096/normal_6036bfd0a85be.pdf
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/bagimofojolegiluno.pdf
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/fadunasadokemapu.pdf
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/c1fb7dbbf4206.pdf
    • https://cdn-cms.f-static.net/uploads/4443819/normal_6049969d636af.pdf
    • https://cdn-cms.f-static.net/uploads/4461505/normal_602a42cf1cbbe.pdf
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/nokifupizezalekixes.pdf
    • https://xubafema.weebly.com/uploads/1/3/4/4/134447535/1566b187c1af22c.pdf
    • https://sawasorepe.weebly.com/uploads/1/3/0/7/130739445/pojumo.pdf
    • https://cdn-cms.f-static.net/uploads/4419836/normal_602ba25f4a7bb.pdf
    • https://cdn-cms.f-static.net/uploads/4458145/normal_6013c19a22f53.pdf
    • https://cdn-cms.f-static.net/uploads/4465930/normal_601f16f53205e.pdf
    • https://cdn-cms.f-static.net/uploads/4477401/normal_602ca306d4dc1.pdf
    • https://cdn-cms.f-static.net/uploads/4472484/normal_602075748b331.pdf
    • https://static.s123-cdn-static.com/uploads/4388038/normal_5fe4312d12a4d.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/jagarokadojiro_dikugojob_mapab.pdf
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/1076062.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://desejole.myartsonline.com/foxit_editor_crack_free_download.pdf
    • http://widifusi.myartsonline.com/85838338767.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_off0000dd53.bin
795640339f1331a25b8b2c0d6c9afd7e0c60ed00bc103180f50d471eeb08df75
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 5176 bytes
font_01_sfnt_off0000ef07.bin
598853aef2ef6c3596de6821b8b559d930886d678d3bccebff59ba48fa65fb4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 10372 bytes