Malicious PDF — malware analysis report

Static analysis result for SHA-256 434ba3cc0865368f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 06:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ea50935bd9e5eab3f4e6be154821987 SHA-1: de07287a80908eeddb42c4ede57136a401819105 SHA-256: 434ba3cc0865368f566f142609acc02e0d5ed07a90cf1c176aae9ba11fdb4f8c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'fokemale.ru', suggesting it's part of a phishing campaign. The PDF's structure and embedded links indicate it's designed to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://fokemale.ru/award?keyword=neoliberalismo+pdf+libros PDF link annotation
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/jetezakip_zitezipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6045e5f09d3fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_60236220bb0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_600a6b77aed60.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/fluval_fx6_hose_diameter.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/cauchemar_en_jaune.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/types_of_organizational_culture_examples.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/fairbanks__morse_1_1_2_hp_z_engine_parts.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/9556692.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/eclecticism_architecture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/ezgo_marathon_parts.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_96e0695e9f7840b7aaf0b14d386700a3.pdf?index=trueIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_bff4c4c5dac44882b225ff415eb5eb16.pdf?index=trueIn PDF document text
    • http://lopogoroje.rf.gd/31706881469.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/delta_unisaw_serial_numbers.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_0b832f6015f042b5abde5bf6833f3dce.pdf?index=trueIn PDF document text
    • http://pudedenos.epizy.com/45914345049.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_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 5296 bytes
SHA-256: aead6a4c2d549255e7b0d7ad82106018fb36d319bbeb5f508997920599748aa9
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 12564 bytes
SHA-256: 8987ce42b3f87d8c859b0e0379784d58a1a71a7ee4088289c21696f84053cfaa

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