Malicious PDF — malware analysis report

Static analysis result for SHA-256 379ce2486cafe86e…

MALICIOUS

PDF

87.1 KB Created: 2021-02-16 01:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f930a9796b621310a806a89211a66804 SHA-1: 6344bf0ecccb5a8540b52abf1c7a91ef6d872a77 SHA-256: 379ce2486cafe86e62b199d3f8818d7870a17e6d4cae102e3a2e5cfb861849c6
196 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are algorithmically generated and point to potentially malicious domains. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a phishing or scam attempt. The presence of multiple PDF link farm heuristics and a high ML classifier score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://seumenha.ru/strik?utm_term=why+is+my+smoke+detector+blinking+red+and+beeping PDF link annotation
    • https://cdn.sqhk.co/zanotunuzi/xiijeig/frog_jumping_contest_hannibal_mo.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/hdjf3Pn/89287085303.pdfIn PDF document text
    • http://power-guard.shop/17915576022c112.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/bRvhbgc/starz_power_season_6_premiere.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/222072147135q602.pdfIn PDF document text
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/nudufaduvodiga.pdfIn PDF document text
    • http://ludshop.xyz/sabagokunakaw390j.pdfIn PDF document text
    • https://mixowobigasobu.weebly.com/uploads/1/3/1/1/131164278/6052870.pdfIn PDF document text
    • http://gratoraama.website/wopirapcyg4.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/lasusejudeditalugur.pdfIn PDF document text
    • https://putuxukive.weebly.com/uploads/1/3/1/3/131379249/vopupafak-kefomewiliz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/bagozonum.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/facebook_reports_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/novevesonujos.pdfIn PDF document text
    • http://nabepazefesuju.epizy.com/jodobupugebemu.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/62848177178.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_off000115f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F3 5804 bytes
SHA-256: a6443da73bfd7de54034c4cc1d9c714849c8e1ef346d3cde3df229eafcb7b1ef
font_01_sfnt_off000129a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A0 11168 bytes
SHA-256: e3a8b39aa7e76adbb495e203720a32a7cf11acb322106e07136db2095dd3ff89

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