Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9f2a6dd1b0d505…

MALICIOUS

PDF

95.4 KB Created: 2021-06-09 15:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec85bba53331e63f04c28987001a4fd4 SHA-1: a86bd8c4ad5338dbf17540ec9c2ccaa44b5f469a SHA-256: ef9f2a6dd1b0d505fd6eacb43c34e3c043380d64dd9de9be8d4ca8b486e0a170
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.6286

Heuristics 5

  • 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
  • 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://smidgel.ru/pbw?utm_term=16pf+ki%25C5%259Filik+envanteri PDF link annotation
    • https://tojezupemizeraw.weebly.com/uploads/1/3/4/6/134629845/sopof_rutimujosurowa.pdfIn PDF document text
    • https://gokaveruziniva.weebly.com/uploads/1/3/4/5/134580144/fiwejure.pdfIn PDF document text
    • https://wibafodutaselo.weebly.com/uploads/1/3/1/3/131380847/bemobejavafebirige.pdfIn PDF document text
    • https://fuvutefimege.weebly.com/uploads/1/3/1/4/131453053/vifopa_vubokipegejunut_galubobufaja.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/sepuzevikezapa.pdfIn PDF document text
    • https://pilitopamazi.weebly.com/uploads/1/3/4/3/134313639/vuxoranalezokav.pdfIn PDF document text
    • https://guxozagubixox.weebly.com/uploads/1/3/1/4/131437827/bdcb7c6a563c.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/xamonax.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/7172422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144531870/mileage_claim_form_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f651bc0-9210-4be0-870f-c22ce35ded0f/what_business_level_strategy_does_nike_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62aaea99-9ff1-40f5-9d18-2ece4a194923/oracin_al_espiritu_santo_de_san_juan_pablo_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d467cfaa-60af-4b1e-a6be-d590d0be8bd1/what_is_premium_retail_services.pdfIn PDF document text
    • http://saladolu.pbworks.com/f/11200767608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64929853-a9a4-437f-8e6f-ae934f68057b/cheapest_fly_tying_materials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51197d9-b010-4b9a-b0d1-08f22ddb1885/vubinegegivagapitoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e7ddac-e7f5-4116-8365-d8cfb650503a/husqvarna_chainsaw_455_rancher_chain_file_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08962be-e54f-44fe-a23d-1f9338785a6f/manixukakegasapeniges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae44a74-98b4-4e04-b033-4d701c39cca2/23867039094.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144427800/xakazep.pdfIn PDF document text
    • http://gurilotav.pbworks.com/w/file/fetch/144825861/dolunosuzuzuzanuzipezuzuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2547384a-fe49-495c-bdd0-344faf4f8c95/katepu.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/last_day_on_earth_hack_ios_2020.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABD 4880 bytes
SHA-256: 95c38489c5312bb28763113720f703b277c78c08a3b87aa4b3aa8a8f88817275

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