Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed544cfc0e451073…

MALICIOUS

PDF

68.7 KB Created: 2021-02-17 23:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 938bbdc4526790a5dc62d33619d25766 SHA-1: 7ec786588adaeb8364817b55fa4bad6514b3d98a SHA-256: ed544cfc0e451073470ce8afc131c89e98e132b5dba29680abf6700bfd55c6f8
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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.
  • 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://jottigo.ru/strik?utm_term=what+channel+is+heroes+%2526+icons+on+spectrum PDF link annotation
    • https://vozomazusow.weebly.com/uploads/1/3/4/5/134510153/lujag.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/gsKhhie/pejema.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/536dca8e82f9.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/1dyEKja/99921905452.pdfIn PDF document text
    • https://pawudovavumub.weebly.com/uploads/1/3/1/4/131411600/03e2f.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/worakifadalut.pdfIn PDF document text
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/d992c02f.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/b8dfa4ca.pdfIn PDF document text
    • http://bewinizujatuw.iblogger.org/vcds_18._9_romana.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/eieicjh/nuzozuweje.pdfIn PDF document text
    • http://markettop.pro/little_fires_everywhere_tv_reviewdweum.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/3445543.pdfIn PDF document text
    • http://kdghy.online/fabegexevirojazimubawju2o.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/lapenadapiwi_fulikipamenebe_rogukesuzagu_rafilaruwubetu.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/17fb655304b81c.pdfIn PDF document text
    • http://xozonline.ru/unilorin_admission_list_2020_19bh6k9.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/jetenogi-tadavotofi-robumute.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/hgxDjfR/79240921267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxajipemafeb.epizy.com/bisanikupozir.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_off0000d2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 4900 bytes
SHA-256: 36d1dc4515d624071dbab2969b2b0d40c72a254c90d756634842c1c7acc22d24
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 10088 bytes
SHA-256: 1e3d2cc22d10853e90a1a3b3c5ba5a9b33772cd4c04a9b5e359d47531a02e716

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