Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bd86c2b45a42ac…

MALICIOUS

PDF

77.8 KB Created: 2021-03-14 11:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3dbc9bbedd92d23c4f3cb252c26e4ccd SHA-1: 9469e827c6fe0108a611d1c31f9009ba59b5ae4d SHA-256: c7bd86c2b45a42ac974e77739a297cd769912abdc298d64ef86c31541deb660c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'baarspo.ru', which is suspicious and likely part of a phishing or malware distribution scheme. The PDF's structure and embedded content suggest it's designed to trick users into visiting this URL, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=archaeologies+of+sexuality+pdf PDF link annotation
    • http://akvatehnika74.ru/aircraft_carrier_games_pc_free5cu0k.pdfIn PDF document text
    • http://servempieza.site/vakimolemugakezgf3ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fd15dca2dbac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_600f2e66c9a5d.pdfIn PDF document text
    • http://milanomoda.site/61061567304i1zpn.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/dsE4jgS/dual_survival_joe_teti.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/b5lYboW/joxagopudoxuwolak.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/ijkiFif/jinadepisekene.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/how_to_pick_a_baseball_bat_sizexonyr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_6030d356cf54a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6e863c1a-bb2b-4203-8311-260fbead8140/what_is_the_formula_of_half_life_period.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_79e24175534843239fc0796cc944b51a.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_907fc3e25f014b06b12f12ff72fb30fd.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_4cc370e8e911439a9ca56f4acf2c02fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3098236-da0c-4ac2-a4fb-38de5aab9cac/qu_es_una_ficha_bibliogrfica_de_un_libro.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_9fc249f9424c4548b636822fadc69e10.pdf?index=trueIn PDF document text
    • http://nerivuvesu.epizy.com/nosadabegoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a325f33c-73f5-4d9e-b6a2-d24589e0e735/rene_guenon_king_of_the_world.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_4913c9c0ad2948ef9785fd100e0520b9.pdf?index=trueIn PDF document text
    • http://nilorarikaz.rf.gd/article_title_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5352 bytes
SHA-256: 48e9fff8f616108a9c6c78de52e4a070f3c82fc0365a765b108e9ea15ed186c6
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 11536 bytes
SHA-256: 6c1651bf08562db418799e66ae5865de0946469b0a5b065ba958a56f0892ebb6
font_02_sfnt_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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