Malicious PDF — malware analysis report

Static analysis result for SHA-256 136556954b1697cb…

MALICIOUS

PDF

70.1 KB Created: 2021-03-10 13:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1259ac4e29b9b56b04e644836bbe7ee SHA-1: 529be8889045f312dc6978d7dbd0aeb4ced0fe0f SHA-256: 136556954b1697cb221fc7cfde7f643ce0065160702403824704c1a4de20d143
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, appears to be related to product listings, likely a lure to entice users to click on the embedded malicious URLs.

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://zajinet.ru/wix?keyword=zinus+upholstered+diamond+stitched+platform+bed
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/tuwenofi_xididoji.pdf
    • https://vasirorikipik.weebly.com/uploads/1/3/0/7/130776585/kubisafonudenopo.pdf
    • http://pc-remont.website/fufufufevipononi1ge8.pdf
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/c4c507ef6602169.pdf
    • http://alifan.store/what_is_the_best_kind_of_champagne_to_use_for_mimosasfhkft.pdf
    • https://kubojetezeb.weebly.com/uploads/1/3/4/5/134586336/puneta.pdf
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/mopodewif.pdf
    • http://losinglotterynumbers.com/suwubilo13erw.pdf
    • https://fidovasunub.weebly.com/uploads/1/3/0/8/130815093/20bd449911.pdf
    • http://winoraama.fun/pnb_rock_album_download40xyj.pdf
    • http://lidagejelotodu.22web.org/kusofodu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mujesogi/48564575209.pdf
    • http://gawexerexi.rf.gd/jobukorokik.pdf
    • https://uploads.strikinglycdn.com/files/44e2d778-e2cc-4774-a52a-d31a194051bc/attack_on_titan_anime_ending_different.pdf
    • https://uploads.strikinglycdn.com/files/97a8c798-b420-4a3c-b03d-52517c1c30e4/how_to_mine_bitcoins.pdf
    • https://s3.amazonaws.com/zarelusipofox/96144350456.pdf
    • https://uploads.strikinglycdn.com/files/77b11de9-0948-4b0b-8d8a-c76c44adf9dd/74090137782.pdf
    • https://uploads.strikinglycdn.com/files/bdbde538-e52b-4d65-a62a-321ecf1f75d9/wheel_horse_tractor_parts.pdf
    • https://s3.amazonaws.com/jiwisi/sri_medha_suktam_telugu.pdf
    • https://s3.amazonaws.com/gogoxowiniza/supuroju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d37e.bin
0898505b127921702e9dd1ebbad102ff24fe504e06d159fc44a35304979d5242		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 5492 bytes
font_01_sfnt_off0000e5fd.bin
b50e49a75f7a61a1fd70ffa33e879ee70c65132c3849a2eb636fcfe7cf2917d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 10340 bytes

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