Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b694b7657374edf…

MALICIOUS

PDF

74.1 KB Created: 2021-03-20 22:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1d076b8d5ad4bf89e4de613c58c809d6 SHA-1: 409105221048e4b6de6c6cf9d5f9058cdef92abb SHA-256: 4b694b7657374edf7e854e5c547191813cd224cee7122ec460df88c90f03816d
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure for 'amathanna video mp4'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://kuzutuzo.ru/123?utm_term=amathanna+video++mp4 PDF link annotation
    • http://lighttravel-ng.com/bifetiwivezusabakisejuxaja0y9c.pdfIn PDF document text
    • http://pelistens.xyz/86878726360ev21a.pdfIn PDF document text
    • http://pubggaming.online/borodotiladaveza50htv.pdfIn PDF document text
    • http://znalomstvavip.site/94097018289ncser.pdfIn PDF document text
    • http://avit0.cc/best_goal_goal_predictions_today4fg8d.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/dDQ5Vyd/93289318996.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/fig0iea/download_lagu_alan_walker_greatest_hits_full_album.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_4638d7ca813447598f2663653a57f5d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/2510226205.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_a130cbe4a5a64aadb3787757543a0cf8.pdf?index=trueIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_94a618608a6248caa6f234bf40a68259.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_f00e3e00046b4e04acadabe1cbde2d7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dadupawo/avast_antivirus_free_cracked.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_e3da2183edd64dca87fa71c3c3636520.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/86437344995.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/emiway_bantai_machayenge_song.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_6f1e11c33ed0497d848c33b27befb544.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_8d66aa01e9b04731a0c06a8d751a9f9a.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_56fd79a173104e30ae17ec87107e03b7.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_53ae0a141c804d2aa1cf76b924265464.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/joviziluzizipifigixi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 5028 bytes
SHA-256: ea297adae404d796a9013de45f67272f69ded956c82a04ce860491e36ad724da
font_01_sfnt_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 12112 bytes
SHA-256: b6797569e90c66288a6f9df659e1e8bfe68e977e3f4704e2dc20f853dc417baf

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