Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c004c51a8bab9f…

MALICIOUS

PDF

79.0 KB Created: 2021-02-27 07:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3b7f3fcde6faf8461c08ad9c3016718f SHA-1: c16ede1582b69c8008231ea481abcb34bd788697 SHA-256: b1c004c51a8bab9ff3d5c389f8a20c6a5254b6a43c2f673abc8a7c804d7a2687
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and a link farm heuristic strongly suggests the document's purpose is to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=quality+management+strategy+examples PDF link annotation
    • http://static-get.top/9319285102436xzp.pdfIn PDF document text
    • https://jelezasi.weebly.com/uploads/1/3/5/3/135347821/betasorubob.pdfIn PDF document text
    • http://burrrhey.tech/how_to_reset_maintenance_light_on_2020_can_am_outlanderi855v.pdfIn PDF document text
    • https://gedibaforajipet.weebly.com/uploads/1/3/0/8/130874683/navid-ludaki-remake.pdfIn PDF document text
    • http://duplicwcnj.space/718484015117mcsh.pdfIn PDF document text
    • https://xupajipodiburut.weebly.com/uploads/1/3/0/8/130814024/2614337.pdfIn PDF document text
    • https://werijumifisa.weebly.com/uploads/1/3/4/7/134729585/bolidusina.pdfIn PDF document text
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/6fec65914c.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/7822693.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/musukibugaruf-dumizikudoruwew.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/limilex_xajizijukajona_rolaris_makum.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/rofopapopelawoloda.pdfIn PDF document text
    • http://krokoboko6.xyz/what_is_the_code_for_a_panasonic_tv_universal_remote923vy.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/cfc92eab.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/astronomy_today_8th_edition78v2i.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/kivebuzofod_xulirafeko_bowepuwopa_mozepajalakoxo.pdfIn PDF document text
    • http://testbankcart.eu/Solution-Manual-for-Design-of-Reinforced-Concrete-9th-Edition-byIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fopalew/30723396456.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/wupanegipupalimo.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/20564332734.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/why_is_my_house_thermostat_not_working.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 1644 bytes
SHA-256: 4e88607400c7e18356ca1c11b80fce52c12071a7e91e74a3a4f51c7e7ab25b77
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 5368 bytes
SHA-256: 91a62f67fd69b6f19cfc5aee5c536abdf76979d28237758a205c2cbfc5aac4dc
font_02_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 11032 bytes
SHA-256: 9ca1f707ee933a440f688e00adf651ceffe3f19729e3d131fef67337fc2d1a1b