Malicious PDF — malware analysis report

Static analysis result for SHA-256 a189ce64a8005a69…

MALICIOUS

PDF

89.1 KB Created: 2021-04-08 05:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 00d2c9b3eb421304a87177a05b76688b SHA-1: b4ea6c8c7dba56f042a46b6d90a4011986efafbc SHA-256: a189ce64a8005a694f31505de865d00b9fc6da7fe1fb21014b700606b70047f3
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing redirectors, indicative of a link farm used for phishing or malware distribution. The 'PDF_SUSPICIOUS_LINK_LURE' heuristic specifically notes invisible links to suspicious domains, and the 'ML_NYX_PDF_MALICIOUS' classifier strongly supports malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further confirms this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/strik?utm_term=disney+world+2020+calendar+crowd PDF link annotation
    • http://senteber.site/252527507128wuvm.pdfIn PDF document text
    • http://wosurijegu.22web.org/across_the_universe_beth_revis.pdfIn PDF document text
    • http://kukushpa.fun/vivemebavenigadoziralibuq3uob.pdfIn PDF document text
    • http://idealslimitaly.site/4345333893o4ss2.pdfIn PDF document text
    • http://sokadap.22web.org/age_of_empire_type_android_game.pdfIn PDF document text
    • http://gelchlen.fun/abhishekam_movie_bgm6szly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6050693182412.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/daxevelatuboge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fd2898eb6852.pdfIn PDF document text
    • http://greyfruit.space/caller_id_faker_apk_fullqsmod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403270/normal_5ffb5873a00a1.pdfIn PDF document text
    • http://rodsfish.club/zimuzaluorh4.pdfIn PDF document text
    • http://klosheff.xyz/minecraft_lite_download_free_pcpn85b.pdfIn PDF document text
    • http://bigchance.pw/anime_tv_for_android_phone65b1z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_605f55aaf2e73.pdfIn PDF document text
    • http://loginwithfb.site/284567258379aznp.pdfIn PDF document text
    • http://meetly.space/wenelixazun790vs.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/3c4b2d9b-3642-4d86-9f0f-d5ac321f722e/echo_srm_225_weed_eater_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636f1c85-ada2-42e0-b54c-2af59d5b9586/hp_deskjet_6540_ink_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c32dde-b62d-4c2e-a103-35f58394d589/78858505730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ff1f86-59b4-4145-bdec-ef459a69825d/30378431843.pdfIn PDF document text
    • http://tukabawibuge.rf.gd/71055022845.pdfIn PDF document text
    • http://gavofuduwaxene.epizy.com/authorised_letter_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f959f1a0-2e67-4290-8bd0-b4efa1d36663/1689578544.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/69370423146.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_off00010fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 5108 bytes
SHA-256: 8e301db259d6c4c096d571d6ddf9ed2f3b5ad70e13b0a68411388d42f71f0e5c
font_01_sfnt_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 12012 bytes
SHA-256: 351d3522e0144310e1b3283e6091702ff0a40b79ea46232e6b3d9d4ded1042eb
font_02_sfnt_off000148c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361