Malicious PDF — malware analysis report

Static analysis result for SHA-256 267e0c69a680373a…

MALICIOUS

PDF

88.5 KB Created: 2021-04-20 10:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 41a26fa628f816c921c4fdb582f5b079 SHA-1: dde0cf0b34890ff73387fa90901b42362ea0f42e SHA-256: 267e0c69a680373af0684685bdadfb7374898d9e40f5c58adee79503c3dd5ac8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9947

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=2016+ap+stats+frq PDF link annotation
    • http://pressit.space/les_miserables_2019_movievv8ta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5fd6520b1a8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_605a95af06354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_606354c179695.pdfIn PDF document text
    • http://storeyou.store/65552689657gbpxy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448735/normal_5fc654f61e309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_604db8e53a53b.pdfIn PDF document text
    • http://busibear.com/wipekibuseweryijhi.pdfIn PDF document text
    • http://birjand.design/god_alarm_ringtone_freetqub2.pdfIn PDF document text
    • http://trujillostacoshop.com/hodder_cambridge_primary_science_stage_41qppp.pdfIn PDF document text
    • http://gtmedis.com/tokyo_ghoul_re_manga_vol_3bd592.pdfIn PDF document text
    • http://premial.su/jobs_social_media_marketing_managerka18d.pdfIn PDF document text
    • http://tizezs.xyz/luwuwukimanuwadilebid263e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6059f8148ca4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_6021a2725e922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff03a240dbe6.pdfIn PDF document text
    • http://chuvashovfamily.ru/17151185567wd0m3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5fe990ef456c8.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/likerajatob/bhikari_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/free_bhajan_aarti_kunj_bihari_ki.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/72362615602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8977ec48-2048-415a-896d-9faf844965ed/junutasujuloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c5d52d-72ec-478f-9f3a-c7972f94012d/laritofimapexamifewuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72120d76-1826-4307-9aa4-6370c4694c7b/does_world_war_z_have_crossplay.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/ropezakiwanefoliragugaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0cfe45-5703-4730-b54d-8b379951aa63/girl_best_friend_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/51199206329.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 5372 bytes
SHA-256: 3477d597608f297b0cfa5c7382a20b2b9c59f845818544c510181731ca8d4cc5
font_01_sfnt_off00011840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11840 11140 bytes
SHA-256: bab8122c21c4f707e4d2d456943ff5e82ac8cda9ec5cab40317c9eeefc65bd07
font_02_sfnt_off00013e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E45 16240 bytes
SHA-256: 93140c8d2dd439df1233b9fdc4e56356eb5a0f283fe723be281a06698e1d98da