Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa32b4e7e791034…

MALICIOUS

PDF

69.1 KB Created: 2021-02-08 18:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a04c9e581f5f523fde3c158510f8fce7 SHA-1: ca316611333a84bc1004c0ca0b08545d792bab00 SHA-256: 5aa32b4e7e791034ef5a6a93909bc44ae75f59f2d897078aec4b133547432449
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external URLs.

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://seumenha.ru/wb?keyword=high%20performance%20parts%20for%20toyota%20tacoma PDF link annotation
    • https://cdn.sqhk.co/xumobopore/hbieLf2/overcoming_obstacles_quotes_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/PigSnhh/gupumopuk.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/XjQ5gfe/pesaval.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/giewKrK/xeworibovulewufuma.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/HljbRij/small_dog_ball_thrower_hyper_fetch_mini.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/bjbhahc/98080907629.pdfIn PDF document text
    • http://folivapizi.66ghz.com/mifepetovobogifage.pdfIn PDF document text
    • http://oneplusonemain.xyz/petujumaxafegerotzriar.pdfIn PDF document text
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/9968517.pdfIn PDF document text
    • https://nezopubetuw.weebly.com/uploads/1/3/2/6/132681339/6199748.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/hjgjhaX/allo_allo_season_5_episode_19.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/eibGusV/49411304689.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/mm4haPu/jovujubazudeter.pdfIn PDF document text
    • http://dalkomis.website/9028852118gf54t.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/fjc4giA/gikumofuwazure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimexibagumaza.epizy.com/video_klip_shawn_mendes_mercy.pdfIn PDF document text
    • http://xesesopid.rf.gd/hayes_school_publishing_spanish_worksheet_answers.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_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 5460 bytes
SHA-256: 93803548ab2510789eaca5c965cd3edd5305d1c3f602feb4318575b54d1782ab
font_01_sfnt_off0000e3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 10284 bytes
SHA-256: 67fb4884638360b80fe906444b888acfa9c34a980c11c03808e5515c3de62447

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