Malicious PDF — malware analysis report

Static analysis result for SHA-256 56154bee3ce202b1…

MALICIOUS

PDF

76.2 KB Created: 2021-04-27 14:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9cf36f262abe886d35568e04111f838a SHA-1: 480ee8f78d55ad55973ca247d54e7b5fdf93b0e2 SHA-256: 56154bee3ce202b11be221eb339802fc960ea354cc4e5e11f5c38e92f4b2d291
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to popular media, likely as a lure to attract clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/strik?utm_term=is+silence+of+the+lambs+on+netflix+uk+2020 PDF link annotation
    • https://tebivozov.weebly.com/uploads/1/3/2/7/132740763/lusuzaputino_letozi.pdfIn PDF document text
    • https://wonaxegem.weebly.com/uploads/1/3/6/0/136049801/kolakutovefazogibumo.pdfIn PDF document text
    • http://gufutaca6.xyz/tikugujivqxy0k.pdfIn PDF document text
    • https://duzufekiwavana.weebly.com/uploads/1/3/4/6/134609718/sisizu_gaxorufadevugaf.pdfIn PDF document text
    • http://rerubin.space/xaguwozc0pl2.pdfIn PDF document text
    • http://ita-yog.space/2_player_soccer_car_gamesm9h93.pdfIn PDF document text
    • http://krepezh.guru/pibixitajedatijp7b4u.pdfIn PDF document text
    • https://fizemovumevomuf.weebly.com/uploads/1/3/4/4/134491325/rubemutalipi.pdfIn PDF document text
    • http://rameautbxy.space/wewakafvb90.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/buxarigude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b80a600-3539-4c55-952e-f0365a781cf7/xofusuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8c837b-5dad-443d-86c0-9e235856ea63/libro_la_interpretacion_de_los_sueos_descargar_gratis.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_1183b6b9f31949b1a019a16327ae39fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cba5f7-3ff9-4a40-b45d-8f02d20a84fd/78394347877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4348609-085f-4b06-860d-a40b6a64e7ca/21522276536.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_22d4749bc1ea4bcb93762279966b5c1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/papuja/89129479715.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/2212640927.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/wopijezun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a4865b-d98b-41a9-8c05-fd00b6bd6b19/dark_souls_1_4_kings_location.pdfIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_efbb52ecd4854965b0b64765e31a40bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/jowuruxo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/36592103255.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_6dc269dc74d64a3ab90758be6b4927b6.pdf?index=trueIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_e5d57faabcdb411a910e70ad4a230402.pdf?index=trueIn 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_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5508 bytes
SHA-256: cfeaf96ad090828b9bd23ee2479edc5894a5262f2e60c20fe81394137a4a3333
font_01_sfnt_off0000fb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 11768 bytes
SHA-256: 7c710cf58ab1c092a770bb0864c7fab2a2a051914a2b83033928c56376e3bfa2

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