Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c84f96f5b9c28c…

MALICIOUS

PDF

91.3 KB Created: 2021-04-09 05:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6958575d14bc1828d6b13c0acd81e870 SHA-1: 285c1d3c69d975fec4bef31a4abc28fada7f3028 SHA-256: 41c84f96f5b9c28c1250d7375aba9460bef1f6000d16ed0d16804d6323a5af36
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external links, with a primary focus on directing users to 'bologen.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Horus heresy dark angels terminators', suggesting a targeted phishing attempt. No scripts were extracted, but the presence of many external links points to a redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=horus+heresy+dark+angels+terminators PDF link annotation
    • https://sotumeramevoma.weebly.com/uploads/1/3/0/9/130969712/datasuvojid-nogajukemi-tagofuduna-sosazukufemoxi.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/4746638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_604b27f17f3ce.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/9207749217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_606892122ebbd.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/fuvuvom.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/21352723525.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/baby_einstein_jumperoo_age_limit.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/the_rational_male_summary_reddit.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/jeromadejuxemitit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_602b457cee952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476756/normal_604e6d4fd11ca.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/30910414482.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/zezanot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_6013c185b0ac1.pdfIn PDF document text
    • http://govovimifakine.mywebcommunity.org/fujajugimuxilezeju.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/63319304851.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/90521487826.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/nefomojuwet/6578180806.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/alcoolisme_causes_consquences.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/47305365450.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/motuvemuwudozuf.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/capm_39-_1_uniform_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/mysql_date_format_day_of_year.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/86883613735.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_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 5368 bytes
SHA-256: 130832506db3147f41ec5573c599a03b9f5672e161003db9b4139c3a68cfa282
font_01_sfnt_off000138d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D3 11436 bytes
SHA-256: 4cce8c985b7f6cc38278baa52886552bfe603ac4843a07a5a50f7e8aafc19316

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