Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbbe76d6d8dee5d1…

MALICIOUS

PDF

69.3 KB Created: 2021-04-03 20:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcfc434e4cdc28a60e9277985b658824 SHA-1: 4bf2b985ba4bf95a6137382326bb0fc41d83a388 SHA-256: fbbe76d6d8dee5d13483b73ea35fd9947667b1458f24d2ce898c2bb070733f62
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, with a primary one pointing to 'lozipotod.ru', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to musical terms, likely intended to trick users into clicking the malicious links.

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
  • 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://lozipotod.ru/award?keyword=chromatic+scale+flute+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416514/normal_6057036fe8c76.pdfIn PDF document text
    • https://fipufiradak.weebly.com/uploads/1/3/0/8/130813779/xizugasifefotosuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_60666bec5578b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5fd96761b5e31.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/1b2a0179ecac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_6064b12a0f210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5ff7c3b22b96e.pdfIn PDF document text
    • https://sevakozo.weebly.com/uploads/1/3/4/6/134677934/zapoteji-takuxujozix-fuxujeta.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/xitubetuzuva.pdfIn PDF document text
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/xumezumu-kiwugapu-xexafugodepeput-vawonelabul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_6054f14a7311f.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/3179665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_603be4b359030.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/fixajofax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_60552dee9a8f6.pdfIn PDF document text
    • https://vipuwajaziw.weebly.com/uploads/1/3/5/3/135398090/xapabi.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/nafoxuda/slope_of_vertical_and_horizontal_lines_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/noviform_augensalbe_rezeptfrei.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/25347119025.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/metodologia_de_la_investigacion_juridica_que_es.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_off0000d311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD311 5300 bytes
SHA-256: eb306bd4e9b1480af649c8398a7defb7f7f30848c9146e91bf6db4c4aea9ea19
font_01_sfnt_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 10444 bytes
SHA-256: 62ddedebc4fbfa4b186daf35251c2ac8015d96825f691c6da4761392979daed4

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