Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d70a1ab728125e…

MALICIOUS

PDF

90.3 KB Created: 2020-12-18 22:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6472dbd9845f653cc63ec51d37a4f67b SHA-1: c880f611bb13faeb4a7c879aaa603d7989318a5a SHA-256: 54d70a1ab728125e2f57a35e97f6cf1ea5f4c952cde0eea00d99a0407ef569a4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign-looking documents but are likely part of a link farm to generate traffic. The primary malicious URL identified is traffnew.ru, which is flagged as unknown reputation. The document's content and structure strongly suggest a phishing or spamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://traffnew.ru/strik?utm_term=offsides+in+soccer+spanish PDF link annotation
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/berir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5fb8661ec4c26.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/wiwuxot/method_of_calculating_national_income.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/pokemon_emerald_iv_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/bavoledagexojugufutejebi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71daa791da6493f68ab84/t/5fccaaf8920f47545b8f8f48/1607248632986/wegetolawezurojebetedanop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2ef2c6de34c7a37e916/1606218480386/csulb_summer_2020_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/carmageddon_2_carpocalypse_now_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4db74e98326c0206f5ca/1606372791803/38680417083.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/group_guided_tours_in_rome.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_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 5240 bytes
SHA-256: a3eb9ef265c0380f5dc731a3551d96152d2708cc0374a85e42df6d9cc2c638d0
font_01_sfnt_off0001373c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373C 10928 bytes
SHA-256: ca138520750dad26d097c77b7d0312dd646136b1c1211f068de7fda0cb5194d4

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