Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7cf8a4bfabae80…

MALICIOUS

PDF

77.8 KB Created: 2021-03-05 15:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 011362ee821dc942f6d340429288aa18 SHA-1: 5e049c9c5b27d1523b5fb1e6eb0edf00c0d5157e SHA-256: 6d7cf8a4bfabae8000c8bf32e96ae8b91924a9430357a34620bdf872abff9c9c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest this document is part of a phishing or malware distribution campaign.

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://midufefew.ru/strik?utm_term=take+3+tablets+daily+means PDF link annotation
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/bikafesotu.pdfIn PDF document text
    • https://patoduwewoz.weebly.com/uploads/1/3/1/4/131483118/2425914.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/jjhegeT/80411384779.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/cPmgeia/46843654301.pdfIn PDF document text
    • https://kazowotamije.weebly.com/uploads/1/3/4/0/134012594/rupuvugibaxemerex.pdfIn PDF document text
    • https://ximepovefuvaxoj.weebly.com/uploads/1/3/1/8/131856443/zusobebabu-kawiragukama-lalemoraziru.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/hhTYLKL/insert_square_meter_symbol_word.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/ihjeNii/38480522632.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/tefipigoxekixav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_f7e44172354e4b61ba1d580276abfec0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ee1d97-2586-497a-a7d8-2ab65fd181a2/30433153068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af8f7e1-d0b7-44e4-b4cb-b7cff97eab78/pudulumeselanafixir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3b8461-2062-4d99-a05f-109625df2c71/how_to_apply_at_walgreens_pharmacy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfeca80-5647-40df-a8e1-43abd99dde3e/are_apollo_pit_bikes_any_good.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_5a8f00206d524ae0b0165012eab7aa31.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_29355f8701b54d51973c4894bd77dade.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea56c2ad-6186-4235-8026-062c65d70b48/guy_who_invented_pet_rock.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_9a62afb86d0c4c8da6b7931711c2f31b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c664e1bd-0e9d-4859-bbe8-cc63b4e6fac2/lesekawobukuvojibitudorin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e60e18-5f4f-42b2-a343-a9478bcb529c/fezelujuvirosejafefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f3cf51-7668-43a8-824f-4a18a69b9773/1997_polaris_scrambler_400_4x4_manual.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_44fa9b697f0c4c448f5822dc5dd58049.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_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5292 bytes
SHA-256: e747e8d210ba767bf18b5c393916b17a4f0ad4058bab36917995afb056a97527
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 10652 bytes
SHA-256: bd9f9ecc8679fd63dcd64ee848c9a4cc6fa0dc5917c567e46ffb2bb33498b9a3

Open this report in the interactive analyzer, or submit your own file for analysis.