Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8460cab03365521…

MALICIOUS

PDF

122.9 KB Created: 2021-04-01 04:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ef5759f73a5d1ca3243b9ee5167eb878 SHA-1: 536b14d253c8b66603d71a3d7b22e62f0252bdf4 SHA-256: a8460cab03365521670c0509d0a52c1814c68fc51dc3eff6cf1c452d32eb48ad
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 0.9999

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://gimoguvi.ru/strik?utm_term=comentario+biblico+mundo+hispano+genesis+pdf PDF link annotation
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/7631454.pdfIn PDF document text
    • http://copyright-rules-help.com/how_to_say_yah_in_hebrew_audiozvhzl.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/3669677.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/93b9e91.pdfIn PDF document text
    • http://slamelina.website/grays_anatomy_reviewgp2w8.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/jazekupebu.pdfIn PDF document text
    • http://circus.market/xozogimakafiwodemabefolrw8uu.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/bugonodomeramedivin.pdfIn PDF document text
    • http://xupoluwifokolo.22web.org/32668805772.pdfIn PDF document text
    • http://sedouche.xyz/formal_park_abu_dhabi_corniche8m0ug.pdfIn PDF document text
    • http://xemifizodagavub.22web.org/tennessee_titans_schedule.pdfIn PDF document text
    • http://qwonder.space/38742517794z9msl.pdfIn PDF document text
    • http://tehnikator.ru/jon_duckett_javascript_jquery_chomikujekz12.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/2429010916qre61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/american_pie_chords.pdfIn PDF document text
    • http://feriwodopumumo.rf.gd/bengali_film_fidaa_movie.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_a3ceedb4adf247dc9cb781378b599990.pdf?index=trueIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_4a5cbdce114141588f2fe34734faca6a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A318 5612 bytes
SHA-256: 66bf1985e72469f2953bbf8417f2c3209500cd61e48b656bbb73a7ab2914ec2a
font_01_sfnt_off0001b5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5F4 11932 bytes
SHA-256: 036eb4421871254402426a4c2ac1caa8981f4abc02ee993c7ee61452ecb23440

Open this report in the interactive analyzer, or submit your own file for analysis.