Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1a29abec896b29…

MALICIOUS

PDF

77.7 KB Created: 2021-03-02 14:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e998c8fa1b10a326b321296196f9c009 SHA-1: bf33c3aa240bda300dadcb437c8ac776f473322a SHA-256: eb1a29abec896b295cb566f9cec64ef5b12fe925cf37ffaf7c0d82a2c06e6825
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one primary URL pointing to a phishing-related query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through the linked content. No scripts were extracted, but the structure suggests a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=what+happens+if+you+fail+amazon+drug+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5fe8f676ed859.pdfIn PDF document text
    • https://rasizuxuner.weebly.com/uploads/1/3/1/3/131378923/562275.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/rjjQdij/31815473783.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/ibjjiiA/traffic_racer_online_friv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fe4e7a72cf80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474192/normal_5fded7c79da66.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/e4Wibij/fufobimaxibajox.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/jkmN6he/electronic_rust_prevention_systems_erps.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/cigiqzH/new_movie_premieres_today_on_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5ff64d24346b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_600f93f0382de.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hjFgWia/73575384616.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hjeiijj/nova_galaxi_dvr_1644_lathe_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fe344a6ecac3.pdfIn PDF document text
    • http://gusitolife.iblogger.org/18113025604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_6007c86af2d14.pdfIn PDF document text
    • http://fepotarugagi.22web.org/barreras_no_arancelarias_en_mexico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zojofat.epizy.com/dark_mode_android_9_nokia.pdfIn PDF document text
    • http://zilapiwet.epizy.com/wajobubedorurunob.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_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 5620 bytes
SHA-256: 922ee07fe8e99ea68816ddac727ea82d7ee8058e6749e25b91f15dbbf75c1fee
font_01_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 10476 bytes
SHA-256: 826b3c5b8a2e995399313ee5b46751e085844619e232a1c48f2c147e36ddb24f

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