Malicious PDF — malware analysis report

Static analysis result for SHA-256 046a23e7c599b22a…

MALICIOUS

PDF

76.6 KB Created: 2021-03-23 01:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e4a96f957d000d7028c00e021a41dfa3 SHA-1: 137800d61de7d9b901c636126cbf695cd5d7b036 SHA-256: 046a23e7c599b22ad7c1010dfdff004401b23794f279fee46c032b152fe11b00
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI references and a high ML classifier score. The embedded URLs, particularly `https://baarspo.ru/award?keyword=domain+driven+design+quickly+online.+pdf`, suggest a phishing or scam attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/award?keyword=domain+driven+design+quickly+online.+pdf PDF link annotation
    • http://sis-paypal.com/best_contacts_for_astigmatism_and_dry_eyesxauyo.pdfIn PDF document text
    • http://naykaryadom.fun/52917132179jiudy.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/60032517645a78ln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5ffba275cb1b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_60484e4a37b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5fd7e5f32e7a7.pdfIn PDF document text
    • http://hhizmet.com/why_does_my_samsung_tv_keep_going_offlinesyewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd9bdc64cfe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_604205455e11c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_600e82d9dd805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_ec8483358e324765a79f84e7e28115d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/gunozibim.pdfIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_9219c1a2fafb4948ab08dd7d3ea21568.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_39be8bafca7347ffad78f0a32106da50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidivo/how_do_you_know_if_your_ram_is_compatible_with_your_motherboard.pdfIn PDF document text
    • http://xumasadepa.epizy.com/nekujedagogozosep.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/wumofit.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_b3b667f3997149a7982347c5fa8d5fe8.pdf?index=trueIn PDF document text
    • http://nutidefuga.rf.gd/vetatafisakenowi.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5856 bytes
SHA-256: c7783bc3d6e64d9254f35124401d562309b98ca42c641c261d0566c8774334e1
font_01_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 11068 bytes
SHA-256: 15fd9109f76efebcb94b33d765788dc38990781c63d6cde95b979d151be1e2b2

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