Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceac535d407170bc…

MALICIOUS

PDF

82.6 KB Created: 2021-04-04 23:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3875b73ac04a45377f593478f0b0ce2b SHA-1: 24bec94d22af4542651be277e644a101653eb83c SHA-256: ceac535d407170bc677749eadcd4ccb64454a1859346906fb9f7e6c79e002baa
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 pointing to disposable hosting services, indicating a link farm designed to distribute content or redirect users. The primary URL, 'https://baarspo.ru/strik?utm_term=interview+questions+and+answers+for+customer+service+coordinator', suggests a lure related to job seeking or professional development. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

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://baarspo.ru/strik?utm_term=interview+questions+and+answers+for+customer+service+coordinator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379049/normal_605c5d53cb84f.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/Kgehgvj/car_dealership_tycoon_mod_apk.pdfIn PDF document text
    • https://pazuvokase.weebly.com/uploads/1/3/4/6/134615635/muzikejoxizidiz.pdfIn PDF document text
    • https://bupebilonozopi.weebly.com/uploads/1/3/4/8/134861312/8796503.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/gjihehd/20864603559.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwovado/D5jitCl/14225093098.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/NRgeijW/warlings_armageddon_hack_apk_2019.pdfIn PDF document text
    • https://vogifidawavuda.weebly.com/uploads/1/3/1/6/131636702/7515938.pdfIn PDF document text
    • https://cdn.sqhk.co/viposaxa/ijygcgh/36469162916.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofelagi/bchjTi7/dark_riddle_apk_day.pdfIn PDF document text
    • https://zijariguduneti.weebly.com/uploads/1/3/4/6/134619007/juduwizezepajis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6012c43120021.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/ghyVg5T/muwanelamoriz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusojomirewo.epizy.com/99049529082.pdfIn PDF document text
    • http://tiliken.rf.gd/gifipufadof.pdfIn PDF document text
    • http://tetizawoto.rf.gd/57525330609.pdfIn PDF document text
    • http://rupadulogoliwid.epizy.com/tidewenanozirotesekaxas.pdfIn PDF document text
    • http://zegeridibedile.rf.gd/ielts_listening_blank_answer_sheet.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_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 5352 bytes
SHA-256: 33abc778480cdbbf8f7b4eab41e7089d0742d6827b68b6d694769db1fb707406
font_01_sfnt_off0001172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172E 10936 bytes
SHA-256: 7299c1b3ec78004aa073bc2122f4ee678dfc968c8b7c68d58c87328eb724d723

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