Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b23521909d89e41…

MALICIOUS

PDF

72.4 KB Created: 2021-01-09 19:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f2e9a87f9fcf5cdacea7bcc0ab4080e4 SHA-1: ace9409188ec9315c32b09b321f773b564e5f43a SHA-256: 6b23521909d89e41a048aa7f05b9c40255a616cce8146846632f3fb2cc6ad31a
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to "Chicken dance sheet music". The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a phishing or redirection attempt, likely designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=chicken+dance+sheet+music In PDF document text
    • https://site-1203255.mozfiles.com/files/1203255/xamugabeza.pdfIn PDF document text
    • https://dijatetobof.weebly.com/uploads/1/3/4/3/134322453/5407100.pdfIn PDF document text
    • https://site-1178741.mozfiles.com/files/1178741/grand_alliance_game_review.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/a08c6c6b.pdfIn PDF document text
    • https://mitenebomowal.weebly.com/uploads/1/3/0/7/130775142/6387100.pdfIn PDF document text
    • https://jaxuguduju.weebly.com/uploads/1/3/4/4/134442137/gezoxebuzumi.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/smw0ggX/shadow_fight_3_weapon_classes.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/lotibabakuj/95751637223.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/geravusejigen.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/61564305195.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/77389518639.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/42430462589.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/applied_behavior_analysis_second_edition.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_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 5020 bytes
SHA-256: f2cdb021ad44b18634ade7702ba608be70b31c6bdfbcf79111b834425d6e6e9e
font_01_sfnt_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 10536 bytes
SHA-256: 2e854ede93aa5f16ae556f9cd481f66350a2b912de6a7e55332250a4907b65db

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