Malicious PDF — malware analysis report

Static analysis result for SHA-256 310aa3124d2042fd…

MALICIOUS

PDF

74.8 KB Created: 2021-04-27 08:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b7cb27ca06e07ecb0a01917d76caf68e SHA-1: 0f28d0839786ffa2b31df9d99b843d4180e18fd4 SHA-256: 310aa3124d2042fd05f71913f1569444d5fa195dfe0a8da768a49f6ee2723e0a
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, one of which is a driver's license number generator lure. The PDF contains a large number of embedded external links, many hosted on disposable domains, suggesting a phishing or scamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=nj+driver+license+number+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446260/normal_601f3fb1745c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451927/normal_5ffb0e2fb1272.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/jfQgje5/80608905301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_6004be85330f8.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/sevesewozukinozekubowatur.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/hbhc40C/angular_formarray_setvalue.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuxemop/jgyVhil/xagubidulas.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/jgdMUHb/nasal_cavity_definition_anatomy_and_physiology.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/fjh7Kgd/download_furious_racing_unlimited_money.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/arduino_uno_beginner_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_b9f3901ea00743f1801163b6823a7763.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_2a731b4d57f5426ba8d4dea311476861.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_24acabd3b0814a39b6702bdb04fc9047.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bc8374-750e-4851-8982-5134af943413/zopavinikudiriwavure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b304d84f-5b3f-4aa8-8901-b11d85eaed6c/limudinoxalasozisomamuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8edeeb0-3062-415b-bb38-1fa3e9e96f46/the_subtle_knife_replica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797c396c-4ad4-4977-bbf5-f3d2cd0620c3/nutribullet_rx_blender_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608c853f-88fc-4200-ae66-bf2be7cc47d4/86576988282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6346b45-064a-4cdd-b6d5-f0f01d70390e/pax_s80_wrong_password_terminal_locked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71096e7f-3158-4ce7-a048-922f41912d4b/bobata.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_afa27f7905b644d4b9dc789a9d46888a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c428144-057d-4e3b-977f-d954caceb4d3/allen_carr_book_reddit.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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5504 bytes
SHA-256: 04965bef608f04ba9a1d39660a9511d430c380c0602278a15323036519ee79f9
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 10260 bytes
SHA-256: 54efa1f647f6308d7f71407a83f8699603a6bf80ef1ec2a46664792812b47d73