Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a17f502f5a1a800…

MALICIOUS

PDF

72.0 KB Created: 2021-03-29 07:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 79ca3e6f8f18a81d633cba173ac1fbff SHA-1: f243f8f9297523be315b7549af420fe98f7696a8 SHA-256: 7a17f502f5a1a800e09ada0aae5d12f203482ce0dcc3aba288526ca370d97cba
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Tipos cancer de pulmon pdf', suggesting a lure to attract victims. The presence of multiple external links and the PDF structure indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://maypoin.ru/award?keyword=tipos+cancer+de+pulmon+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417526/normal_6047baa58dbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6050046fb42a2.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/bfhjMjd/battletech_dragon_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/jXJihk2/download_game_nba_live_mobile_basketball_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/0idctiv/dagurasupiwipesazijubemib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fe53e366e8d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd124863695f.pdfIn PDF document text
    • https://cdn.sqhk.co/rokunufoleti/hhsgcha/zunafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_605bae4600b2f.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hfjdji4/tanokeso.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/eigiihh/smash_glass_and_vape_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/91106492072.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/beyond_good_and_evil_nietzsche_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/36028405082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda4eed8-fbb9-4f48-b317-5d2c59144a18/how_to_call_functions_in_a_class_python.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/bahujan_samaj_party_manifesto_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9609c1-fad0-4b50-8e7a-11488bfc3b90/what_exactly_happened_at_the_end_of_vampire_diaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef84c7e4-1f35-449f-9cfb-5ea8eb270201/mikaleninuxum.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_dc829ae5a8764d3fad017875a53a5610.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_df65e76a126647299743e0fbeaeb95b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04349440-129c-4265-bd8e-b2d156767e82/petsafe_eatwell_5-meal_automatic_pet_feeder_manual.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_c0937b64bce84219b81337f9f4bd4d14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/78237223570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3093db8-d471-44f9-bccc-2743e688020f/67197291580.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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 5248 bytes
SHA-256: 3a3dd8499b653782b3467c380bb300016f9dc3178d5b249edf0bf014b519b140
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 11148 bytes
SHA-256: 06d22870d8b305a7bd2e2c8df3039816085eaaca3ee174edba7cd8cc7919bd86