Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1adbe95d16f003…

MALICIOUS

PDF

72.2 KB Created: 2021-04-18 15:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d5ec99eb0dc2885e23f153fb84feb6d2 SHA-1: 4c648615008fd7b77e14fd18e4fec62eea5b29c9 SHA-256: ab1adbe95d16f0033b5336898945c6ded125d8c634e20d6874f2b6b06f17f2b0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://fokemale.ru/strik?utm_term=zmodo+dvr+port+number', indicates a lure related to network device information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=zmodo+dvr+port+number PDF link annotation
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/928501.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/rebirogos.pdfIn PDF document text
    • http://wunegaxuduru.22web.org/hidden_causes_of_heart_attack_and_stroke.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/boxupesotel.pdfIn PDF document text
    • https://voxiranadazezud.weebly.com/uploads/1/3/5/3/135312978/3cf9a16577bb5b.pdfIn PDF document text
    • https://varudidijosafi.weebly.com/uploads/1/3/5/3/135316544/meminunoguri_zejojinipuxow_perux_wejadiven.pdfIn PDF document text
    • http://medgaj.com/275321616449bmyk.pdfIn PDF document text
    • http://moitender.org/somexerabadibamezamakonhn5s.pdfIn PDF document text
    • http://hq-cleartv.info/why_was_there_a_stock_market_crash_in_1929ivwn6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_3fa7b4ca7c2a463dafec8f88b35a17ec.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_6656079f04474befb75ff14e1d549ea8.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_27096ca8823f4e8b844bce552a0ce723.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_fd8580b6297a4b28ac5b5d070beada28.pdf?index=trueIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_f6e4b6243c1d4fe9b0cfb1993f601928.pdf?index=trueIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_784171914129443ea0de6031a3cb7986.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f60796d-4235-4b6e-bce8-d3484655cf92/65481831573.pdfIn PDF document text
    • http://zipejof.epizy.com/definition_of_qualitative_research.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_ec992ab55a084d009dd85d7dbc357d8d.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_c05762eca92544f88d3c466951d46636.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_865de9c66845488da64afc3be283e65e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cf3bad-896c-4b55-95a8-830afd9ffe1b/89454864335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd274b3-ec45-4ad5-a00a-e70970092d06/nuance_dragon_home_free_trial.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_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 4844 bytes
SHA-256: 03da6f9da9c5957efd3cab12c543e8d0ef92f5dca1e281797d5b335614afd689
font_01_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 10500 bytes
SHA-256: b76cf6a4d36b3d90152bca5d6ce035e3e9c15a7f11c199b130e040d66c673ce0

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