Malicious PDF — malware analysis report

Static analysis result for SHA-256 592322eacc99ec39…

MALICIOUS

PDF

83.4 KB Created: 2020-12-18 06:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c2f5a9e64f2bb3f4b73c0897bb16ee0 SHA-1: ba7fa7c7b945e3d17771fc56d16b3186185c1733 SHA-256: 592322eacc99ec39c74924d024a3918638dd37b8a2ac730156de2d68ba8929c2
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded URLs, with at least one identified as a known malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://traffine.ru/123?utm_term=d%2526d+player%2527s+handbook+pdf+3.5 In PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/ae6278fa.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/fewaram.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/besupog_duniboroviruba_wazixixaboka_fisitodinusavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc36f6bf81c9a2a0c0e0454/1606643564599/nakif.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/52217802745.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b829cd1e280355f52c70/t/5fd1c23eef89ac668376625b/1607582271413/32482519141.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf69df1972c46e3c9729a5/1606379999821/10806082501.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c59a03f04e270fe027bd/t/5fc865f28eecd53e39e9d48f/1606968818943/valejidin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18bbd0b6b03258f3a1e10/t/5fcfc2aabc767b67561aed19/1607451307225/kiniwuwuvutafitef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6763d68612547ed8438d4/t/5fd6dad513a48350e8249f61/1607916246281/cat_sounds_ringtones_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 3456 bytes
SHA-256: de9814b747036134b18a53129b8d086b4620b0c6ff081e531b2c2c6b7f2391e2
font_01_sfnt_off00010a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_02_sfnt_off0001184b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184B 12416 bytes
SHA-256: 662f424ef865f1bb58bfe5f1ba35289fc9da550370fab2236f732666e00a2ae2

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