Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff1c0d01da67f0b…

MALICIOUS

PDF

82.1 KB Created: 2021-02-13 13:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 216418c31a412c2250f3fe8100977230 SHA-1: 55fee666e42780da09477fd3b7d99bd5594e57fc SHA-256: 6ff1c0d01da67f0bfdc999437ea05d111715dae1a7fd81009397e982ae9a81ca
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. ClamAV also detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. The embedded URLs are likely used to redirect users to phishing sites or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=persona+3+mitsuru+voice+actor In PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/porinaxasis_rozabijusosaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_600c845839f3d.pdfIn PDF document text
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/8390608.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/hg7gfhc/nanny_mcphee_big_bang_film_locations.pdfIn PDF document text
    • https://sokotomajav.weebly.com/uploads/1/3/4/0/134040389/f51756029bb.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/nujokujifonogokuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493890/normal_5fce940dd3aea.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/20af9fc3.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/8261779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455681/normal_5fe55fdedfe30.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/xasutawoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fec08ca351c4.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/mafesenenuki.pdfIn PDF document text
    • https://limulepaxot.weebly.com/uploads/1/3/1/3/131379958/xoratesa_mojinugiku_paniki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fe1950ac31aa.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/hdhdtha/31710150727.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/rotonu_pajugupigi.pdfIn PDF document text
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/8361579.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/kudowo/bangla_dictionary_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/google_camera_xiaomi_mi_a1_apk.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_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 5136 bytes
SHA-256: 600dd326d5d75b914c3a02750660b587e21b8a12a68efb1a58598f8ef27f8fe0
font_01_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 10684 bytes
SHA-256: 9fc7a4a0af892281c840c91a2fbbd56b8ebd2a4fd648d18a3249e0eb81905898