Malicious PDF — malware analysis report

Static analysis result for SHA-256 5149fe92eebb4c30…

MALICIOUS

PDF

71.1 KB Created: 2021-03-12 08:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11aef82e965536fd738c2274c1a316fd SHA-1: 154aa5615306812f7054422a3ed535933affe988 SHA-256: 5149fe92eebb4c30475baa6fe3401ce25c3e88b57033083d4598536df45f220a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=gold+text+after+effects+templates PDF link annotation
    • https://cdn.sqhk.co/surodamiz/geicugf/sazekatekaloramudururos.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/jehbFIe/74383479518.pdfIn PDF document text
    • http://easterthjg.com/bonazajodikutojurulgfrmf.pdfIn PDF document text
    • https://cdn.sqhk.co/tikomekove/ibAjf3m/8104646476.pdfIn PDF document text
    • http://ilook.market/faxafunovezawijawifjo17.pdfIn PDF document text
    • http://italy50wow.pro/xesoruxorowowatidg2im.pdfIn PDF document text
    • http://verenica.net/mirajitufovituzikofinncpm4.pdfIn PDF document text
    • http://leomannapov.com/bugovg5se3.pdfIn PDF document text
    • http://kukushpa.fun/926730974906otbz.pdfIn PDF document text
    • http://instapriz.online/journey_to_the_west_the_demons_strike_back_full_movie_in_hindi_download_hde1uzd.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/85hgjqB/pocket_rockets_poker_app.pdfIn PDF document text
    • http://mscgis.net/2413202113703dnx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_9efbd3327ed544778566c26212d844d6.pdf?index=trueIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_c4b8cfc06b01437593d167f7a73a0dbe.pdf?index=trueIn PDF document text
    • https://451cdc1f-766e-44a1-8a9d-f9db2ecad5ed.filesusr.com/ugd/0f0d48_9c0e4704e7404293b6cae69f08f09f77.pdf?index=trueIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_fb9db9bd71c3401f84c9057a45aefea7.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_c90cd978554f40fe8d8bb83d9985f9a7.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_a139c1e3e4214564babaac4832f5e034.pdf?index=trueIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_2cb1a64de24146338138ef847853e829.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_b75767349c614308b1e138db02ad0406.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_66c2f3451b3647abb9b1822f069497a2.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_55497f5a3ddf4fdf9890594a4f69f921.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_27492c0c0cbc46d494f96bac0ec6b732.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_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 5400 bytes
SHA-256: 823dca4db8b5c42c313e95c233a2a8c871d19a098b186efed9fcec85f308080f
font_01_sfnt_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 10456 bytes
SHA-256: 252b4fddbf912d06c6263144f3fbe7c18b6b4181d78df4c2c81ce393b8e9bfe2

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