Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee37394418cd452…

MALICIOUS

PDF

72.6 KB Created: 2021-01-06 21:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ae34217bef4abdbee88f6775f3bd7f28 SHA-1: 3297d25267b95043288998c6ae6b21497109ae0b SHA-256: 0ee37394418cd452de8cd703ebd180ca4e9622579e4373b4faf434310abe2efa
176 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is malformed and contains malicious content, flagged by ML classifiers and ClamAV. It also hosts a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary URL points to a software crack, a common lure for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://trafficel.ru/aws?utm_term=audacity+2.+1.+3+crack+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fb38b2da0548.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/tSCjefI/jutamedejura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469375/normal_5feb5cd49dfa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5fb5b60542dbc.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/YsMzgPL/falling_in_reverse_songs_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/U5njggh/real_crickettm_20_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_5fab3b4ba5180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f890899412ac.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/kadijobivefabe.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/iHifohb/wuzogujefuri.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/ApBghmU/61160936269.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/hYig7FU/block_traffic_noise_in_garden.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/8hdiege/99750706300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fe5b1120e579.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/juzowilipi/buy_aiag_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/sudujekuzavilibosojekixoz.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5340 bytes
SHA-256: 21f447406ad89ab6aa001fbe5054026dde7cf070de3a73f618b28f5d447bb811
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 10996 bytes
SHA-256: a00c8e61614d6a1e5d0a615e5b318ed0f7670616685c4d59e9f5da89c04877c5

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