Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f706f5e61f1917…

MALICIOUS

PDF

83.7 KB Created: 2021-02-17 23:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ed183aa1594e19b11422e444ff6cbc5 SHA-1: b287fe0f15dc102e0f864428a6bde9c71dca4018 SHA-256: a3f706f5e61f1917285361f0446277e6615d659451abaa4aa251d8bab1b3fe35
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://crophysi.ru/wix?keyword=old+testament+quotes+in+matthew In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467298/normal_60017f1061e89.pdfIn PDF document text
    • https://likomajuf.weebly.com/uploads/1/3/5/3/135321460/vikanawuv_povarewozewu_lerolekujudara_nikelogikofi.pdfIn PDF document text
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/3772953.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/a0e0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_601870fc3f6ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_60089efee92dc.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/5012556025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460048/normal_60039e691fd67.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/fevazu_rapuvuzi_kugibala_kudeno.pdfIn PDF document text
    • http://perexifolelave.iblogger.org/dominos_pizza_ingredients_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5ff766113356b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_602b99785df07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5fed7977503c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_5fe05f963a228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_60134eb2a0fe6.pdfIn PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/ludoja.pdfIn PDF document text
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/rejemusiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifofupox.rf.gd/fotozavuxew.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/assault_android_cactus_metacritic.pdfIn PDF document text
    • http://xesidif.epizy.com/96805877019.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C71 5216 bytes
SHA-256: 85df2f2d9413445997e0edf5992063ba232d2833f02c0b4c2f91325e03192f81
font_01_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 10396 bytes
SHA-256: 0077edb47330260bdc05d4ff7a26f85b975ee9dc3f95300450cb4709d36c2d81

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