Malicious PDF — malware analysis report

Static analysis result for SHA-256 4261696481093488…

MALICIOUS

PDF

82.8 KB Created: 2021-03-26 07:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3a3dbeacaf279c76904e0313a5ddbf66 SHA-1: 18abf7fe93e2011f3d8e54dda1e8c3e4f567c768 SHA-256: 426169648109348836eb865a694446b9b7e99e0c80e10948d22b4a1655fcbb82
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 0.9997

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://golowaki.ru/wix?keyword=is+distilled+water+heterogeneous+or+homogeneous PDF link annotation
    • https://jevijoju.weebly.com/uploads/1/3/5/9/135978445/vegixesa-ninojolixeb.pdfIn PDF document text
    • https://dasiwijumajofep.weebly.com/uploads/1/3/0/7/130739595/xepakelufiwen-savup.pdfIn PDF document text
    • https://napopetonepew.weebly.com/uploads/1/3/1/1/131164038/91e99d120b6bf3.pdfIn PDF document text
    • https://mudodawi.weebly.com/uploads/1/3/4/6/134653299/4181690.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/tezele-jimuwaseruz-fitetupujuniw.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/ihLjaYv/rumekuwufomubesiwajitun.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/geRixSh/kannada_janapada_dj_songs.pdfIn PDF document text
    • https://garururukipu.weebly.com/uploads/1/3/4/2/134235121/3e84f1796db.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/b5b44d6fddd.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/egjhBjj/teppanyaki_grill_laurel_coupon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c9412f-61bd-49cb-a829-a41261c614f4/repagodavevazujovifef.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_e555cbfd87404da99d7cb40a755301d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/234d1b5e-e369-4b98-90ae-7d59862548a5/sex_and_the_city_cast_season_1.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_8bb080c0e365479aa34fdcac1b28e771.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_75fd4b231214407c9fe664bbd2340efd.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_08496a3110ce4683aa672dac43a5ea06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/creative_parallax_website_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd70d9e3-5272-49f9-bfb1-004235bcca05/58900896960.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/jopov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ab9dfd-c842-47c5-a97e-c9cbe62252d5/26351349380.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 5268 bytes
SHA-256: 1fd815d303c640603266c0f580516202298494e8b932eed4eecdadaf35388ee4
font_01_sfnt_off000119eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EB 10432 bytes
SHA-256: 8cca42b18c98b9ea70abea1dc6317c85dc9e031ca3b9358b522b048d96fefa6b