Malicious PDF — malware analysis report

Static analysis result for SHA-256 89986a52df426870…

MALICIOUS

PDF

71.5 KB Created: 2020-11-13 20:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb2e782ff648362187f8effa0c1d68b0 SHA-1: b7ad93d0594c3ba66fc9f53dedd9cd61698ea8f1 SHA-256: 89986a52df426870508c9f54b3597d908aad6abad50a1e5f84f4e19b51255ae0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to malicious websites. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting a phishing or traffic-driving attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=step+dad+birthday+poems+from+daughter
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/zajexerusolivunibuse.pdf
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/pemozozogudobidowofi.pdf
    • https://fekanefitogi.weebly.com/uploads/1/3/4/3/134340372/9105902.pdf
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/a30efb594c35.pdf
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/3798231.pdf
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/jobivavexavigad_vidova.pdf
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/naruvodozunujew.pdf
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/319c4bd274986.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ebf6c685-c2c3-4346-98b6-3f9455d89179/avakin_life_hack_tool_no_verification.pdf
    • https://uploads.strikinglycdn.com/files/545827ac-0d3c-4cda-a387-9e6723099f43/jozagadapemakirewales.pdf
    • https://uploads.strikinglycdn.com/files/6a1d83ca-f60f-4100-a1af-ab94ce170776/43429607578.pdf
    • https://uploads.strikinglycdn.com/files/7f7cf88d-b40e-4261-95ed-879d325d0e22/22846341605.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caaa.bin
1d727d0a9a5b33e1356e0dc807d279bf269550b707d7fcf5339acd7033d5df62
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAA 5544 bytes
font_01_sfnt_off0000dd84.bin
d11ff3f081ebe86347f12ae9d73d143db9221f3c2887fe03cfdd308ec83f0e4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 10912 bytes
font_02_sfnt_off000102c4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 4324 bytes