Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5eb48e6330112c…

MALICIOUS

PDF

84.0 KB Created: 2021-04-28 20:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5cc0307206b138a2e0b74e53a0de4dfc SHA-1: 5a6c8f670a77e1cdfd2d1f97006fcc6bffe77e3e SHA-256: 0e5eb48e6330112c83f18f68955fa02c8a25f7093e45a92f4d8e022a1af3147a
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://bologen.ru/strik?utm_term=excel+index+function+row+and+column PDF link annotation
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/635604.pdfIn PDF document text
    • http://fasad-dom.site/55189893310oz6li.pdfIn PDF document text
    • http://organicnu.info/sowepuwuxilomusolobaviza31i.pdfIn PDF document text
    • https://dujakoxuk.weebly.com/uploads/1/3/1/4/131483447/642579.pdfIn PDF document text
    • https://gedarimetesuja.weebly.com/uploads/1/3/1/3/131398281/28c65.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/jisedasabimil.pdfIn PDF document text
    • http://trysol.xyz/how_much_do_you_get_paid_to_be_a_foster_parent_in_ca13f3d.pdfIn PDF document text
    • http://detonic-romania.website/apka_me_apka_sitara_songry96q.pdfIn PDF document text
    • http://fitnesspack.net/why_is_my_air_conditioning_flashingvi34w.pdfIn PDF document text
    • http://thesalle.xyz/suzuki_sidekick_engine_specsi46z1.pdfIn PDF document text
    • http://jirafka.space/what_does_it_mean_to_dream_of_a_baby_vomitinguhvsi.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/fojetewikukivasitgcs0.pdfIn PDF document text
    • http://trelon.fun/viberakasiwixls.pdfIn PDF document text
    • https://dexewagumaz.weebly.com/uploads/1/3/1/4/131438443/2521987.pdfIn PDF document text
    • http://persequen.com/nomorafipiniduwuberixulvie.pdfIn PDF document text
    • http://yoga-italy.space/zasodovibifmjp.pdfIn PDF document text
    • http://aires.fun/tavadamoninoud878.pdfIn PDF document text
    • https://xaduvabelo.weebly.com/uploads/1/3/5/3/135324105/8395547.pdfIn PDF document text
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/luxagovewopozilinugi.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/83d330064001.pdfIn PDF document text
    • http://lollipopa.online/briefly_describe_the_cohesion_tension_theory_of_water_transport_in_plants7fpep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_9c55ef0b14514546bea15ce90878d083.pdf?index=trueIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_26b3ff3910b948f3ad0990677f8d0915.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_89eeb27ffcc840639df88948adcf3134.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_4524dac8e2c94be18cac469f508ff5c5.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_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 5104 bytes
SHA-256: 70f1f26c80295dc2d8fc325e95c9c1a23fdc523134f5488e2d627bd84480c05e
font_01_sfnt_off00011bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BED 11204 bytes
SHA-256: 1f5da075348b0de42603771600c0507a67a3f3c6c0d16a738d5810ed469b59ce