Malicious PDF — malware analysis report

Static analysis result for SHA-256 d976db9236328a81…

MALICIOUS

PDF

102.5 KB Created: 2021-03-30 11:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7fedb85a47f0adb39fcd17d64cccd894 SHA-1: c1ad691c4416a74bb56cede722c01e33fb475668 SHA-256: d976db9236328a8134132e8d4dc39b51ae3243204a7e6f26a130bba576e214c0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure that directs users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/aws?utm_term=tamiya+blackfoot+parts PDF link annotation
    • https://cdn.sqhk.co/sunawopi/FYb1igb/60933764128.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/vamejopijoliju.pdfIn PDF document text
    • http://insurancesouk.com/lotaxidojutakanizowuxivlpt.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/o3CEhjp/36482347337.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/iThajih/pokemon_game_for_android_mobile_apk.pdfIn PDF document text
    • http://groby-ritual.online/genealogy_of_morality_quotes2h5gy.pdfIn PDF document text
    • http://shoop-fn.ru/23512435033fk3h0.pdfIn PDF document text
    • http://carinsusa.info/what_are_the_5_parts_of_a_story_structure389gx.pdfIn PDF document text
    • http://pro-komp-master.website/craftsman_4_cycle_weed_eater_wont_startdsr7x.pdfIn PDF document text
    • http://wonnaturila.space/antonyms_vocabulary2o0r5.pdfIn PDF document text
    • http://motozed.scienceontheweb.net/collins_scrabble_words.pdfIn PDF document text
    • http://virona.org/how_to_fix_uniden_cordless_phonerwy1l.pdfIn PDF document text
    • http://nugawijuxuv.mywebcommunity.org/30898235514.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
    • http://nabepazefesuju.epizy.com/nilojevamotil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fe617b-24ae-4f0e-9786-d4b0624ec8d3/dakoladefoxidejip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261929f6-c013-4187-ba8b-60b7dd51bf9a/practical_machine_learning_course_project_prediction_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acecfded-65fe-4d0b-9fa8-d998959726b2/vovutexomotabutidetepus.pdfIn PDF document text
    • http://gekuxexotomilo.epizy.com/6488211104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/361b9f5c-d993-4b21-a202-7754e107d0cf/zudubaxusigineruzotenu.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/motu_patlu_ki_jodi_video_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5995c6e-7444-4598-ba5a-cb9fa42a9b34/vegezewewobugaxubokinirum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE6 12384 bytes
SHA-256: fab1ff3a07b26dd83913311cea9a7ad0b40da85fd7ff5e8a0b00173e0bf84784
font_01_sfnt_off00014805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14805 4980 bytes
SHA-256: a358a53a8df634bca2828d9c8eab961f6c6a4e3b25b1ea826e51c83a0c2fe8dd
font_02_sfnt_off000158f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F2 10892 bytes
SHA-256: f0d8e1b47b388643c001f555ca70e254274a0cc80f6ffbd506139ebac947b220
font_03_sfnt_off00017df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DF1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c