Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca272fb0ba80c73…

MALICIOUS

PDF

80.8 KB Created: 2021-04-09 06:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4dec1b1baa5ca82a2ab86e3b611498a9 SHA-1: 295547249a06d67d295a95b981a7f0f2e7c19348 SHA-256: 1ca272fb0ba80c731b4eea5844436aefb476c5b55e0d97891856bec0689eeb1b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=how+much+will+a+5000+watt+generator+power PDF link annotation
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/zeporizumogofip.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/bbff7cb5d.pdfIn PDF document text
    • http://vosaret.iblogger.org/diwatupu.pdfIn PDF document text
    • http://amorexpo.com/65221777795afvnn.pdfIn PDF document text
    • http://instacopyrightcenter.com/60882447525tedtb.pdfIn PDF document text
    • http://mini-cam1.club/avg_vpn_crack_apkbprwb.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/lofavol.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/femod_kajobizo_kawarumowag_kuderufok.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/bulek-nizefufamowusa-woduvoperanilax.pdfIn PDF document text
    • http://buliwomof.22web.org/utilitarianism_book.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/wenikefowi.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/2246471.pdfIn PDF document text
    • http://riwalimuj.scienceontheweb.net/bodybuilding_workout.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/36c5b324e.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/xagumopobowuwukudibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_eb06991f6ab54c4c8058e060602f1469.pdf?index=trueIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/exporting_outlook_calendar_to.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_078dedf8847741bb847e29edd206cbbf.pdf?index=trueIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_50ee0bb446b845c2a6dde9d57dc43088.pdf?index=trueIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/24947736460.pdfIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_e10ceae5447a48b69c0ac50a999add1a.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 5372 bytes
SHA-256: 2a743688824bbcff93b431fa256f3e09bd8c317a7e71e9b32c3efe43a3c46347
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 11468 bytes
SHA-256: a64054fd348a1774e54e89d75ad395ff8d4604e916fca68a3164ce3dd3e4d362
font_02_sfnt_off00012582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12582 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c