Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac6e5367d9eb9c6…

MALICIOUS

PDF

77.4 KB Created: 2021-02-23 20:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2dbccc1ad26909360b0c41d27b1d9e67 SHA-1: 158ed1e6d5f19ecd090a1acbf4f0f8af90ffddbb SHA-256: 6ac6e5367d9eb9c6669f24c0ca950db7e1e2064f920db79b3828e52f405c66f0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, including one with a 'utm_term' parameter suggesting a tracking or campaign-specific lure. The document body, though heavily obfuscated, contains references to 'MBTI most compatible types' and the authoring application, indicating a deceptive content strategy to drive traffic to potentially malicious sites.

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=mbti+most+compatible+types PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5fc7e29d3a045.pdfIn PDF document text
    • https://zusebogodi.weebly.com/uploads/1/3/0/7/130740375/madofixamisijalenumo.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/scaricare_aggiornamenti_android_senza_wifi.pdfIn PDF document text
    • https://webemimerur.weebly.com/uploads/1/3/1/3/131380848/d9579ff364.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/gebojokuxuzeze.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/jhMifhh/celebrity_voice_changer_app_price.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/iffjfji/easy_facial_mask_for_acne.pdfIn PDF document text
    • https://wapavamo.weebly.com/uploads/1/3/1/6/131637186/temupopajixew-difoluwub-sarijemawe.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/15435f.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/bmicgg6/28009976903.pdfIn PDF document text
    • https://bozelisu.weebly.com/uploads/1/3/2/6/132695328/zagetamurero.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/setarajavoto-bonalub-mexov.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/jBvx1Ma/mhst_the_adventure_begins_full_version.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/731509.pdfIn PDF document text
    • https://labekefetimobu.weebly.com/uploads/1/3/0/7/130739294/sikojefozup-tovad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renureva.epizy.com/lejuxoregajofaxadifowix.pdfIn PDF document text
    • http://ruvowepager.epizy.com/quorum_sae_reporting.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_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 5232 bytes
SHA-256: 8edd9404e128795674b6810b875ba232e6411d6fb0cd6be414bb5ebd895d033a
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 10308 bytes
SHA-256: b2acefc3e6a9b5009b83d8af300c793daf871bcb24d9f052f37a2f33a519a0d1

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