Malicious PDF — malware analysis report

Static analysis result for SHA-256 233ae49cdae530d5…

MALICIOUS

PDF

70.9 KB Created: 2020-11-11 00:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 21f490f1620b2409f8584209517a56ce SHA-1: 1e10dc6ee39c74cb988b51b1dbf79df1123b7560 SHA-256: 233ae49cdae530d5762a99dbd87e14235145aac2eabdd75ea9c8fa47b1458864
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Miami dade clerk of clerks', suggesting a lure to attract users searching for this term. The presence of multiple external PDF links and a high ML classifier score indicate a malicious intent, likely to distribute further malware or conduct phishing.

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
  • 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://trafffe.ru/aws?keyword=miami+dade+clerk+of+clerks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5fa7ae1449866.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/pujevetovox-wexikudubosaxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f9511c631476.pdfIn PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/jasawudatinazak_dedozuloxaj.pdfIn PDF document text
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/detib_tajum.pdfIn PDF document text
    • https://radelemetiwiwi.weebly.com/uploads/1/3/4/5/134520029/fb355c54.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/aefc6.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/ganubatebedoxez/22166552556.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/kumub.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/realistic_physics_mod_minecraft_1.11.2.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/76004304374.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/combat_fighter_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fomawipafuz/deep_speech_dnd_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/spectrum_remote_codes_for_tv.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_off0000d938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD938 5236 bytes
SHA-256: 34739c5009dfba7b9363838b515db16ef2469285c66b3a7ad5373f9710751fcb
font_01_sfnt_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 10608 bytes
SHA-256: afd2bc1ad16ca371f21dc549aa4ab69238c92bf40ecac8d30baebc786bb7b813

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