Malicious PDF — malware analysis report

Static analysis result for SHA-256 162eecb87ea759ca…

MALICIOUS

PDF

73.5 KB Created: 2021-03-11 20:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 796ae2f0ef231036b9d12a6f570c9530 SHA-1: b2685671accdd6cd001b9eec0493ad3035a03bc8 SHA-256: 162eecb87ea759cafc54385b20ee5ef46215d92a5b595b77ba9f875386d34c78
186 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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/123?utm_term=scofield+weather+report PDF link annotation
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/47fa7282fde65a.pdfIn PDF document text
    • http://milimoje.iblogger.org/tibineroluwanukumoxaloput.pdfIn PDF document text
    • http://testersairf.xyz/questions_based_on_vsepr_theory_class_1174o7l.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/M8njijd/73558310510.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/wimitupovu-fefexap-xesubupe.pdfIn PDF document text
    • http://straponartist.com/76626193628jq9y3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ff66fd3dc472.pdfIn PDF document text
    • http://hookup750.website/resumen_de_la_novela_doa_barbara_romulo_gallegosip3k2.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/fgcQ15Q/10907975829.pdfIn PDF document text
    • https://cdn.sqhk.co/xiponamoribo/cgiR5ic/tags_for_social_likes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/bjhggOb/bounce_tv_channel_number_on_directv.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/1ggiijf/pabudek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_6022eb3706390.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/e78148.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_2d703d133f32402b92b0203b06e00684.pdf?index=trueIn PDF document text
    • https://1b6a1bbc-c127-422b-858f-c975555fd18f.filesusr.com/ugd/31f47c_c740b5334dd84f638979d160995c52fe.pdf?index=trueIn PDF document text
    • http://dogufisojorosef.epizy.com/51007383525.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_36f0bed3b0fb450eba5a78a6c6181206.pdf?index=trueIn PDF document text
    • http://bisiziwaros.epizy.com/vikijad.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_7d0c9cd9a07f4a1bb0477eb3ad64db55.pdf?index=trueIn PDF document text
    • http://vexujul.rf.gd/super_androide_17_dragon_ball_heroes.pdfIn PDF document text
    • http://moxozejoxolisuf.epizy.com/48531994712.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_1d97449cdcf646b8ac1aadf67494de11.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 5260 bytes
SHA-256: 9b524ea6d4c6de33ecc8208e77f2412f35d0f82c139e8039aaf0531913f2c2ba
font_01_sfnt_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 11192 bytes
SHA-256: 8d9c61d9ecd611dc5ca3fe2f731deff211e47d22e60280a36254f0c6ef030933