Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f935f868c69cc1…

MALICIOUS

PDF

82.5 KB Created: 2021-03-23 22:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 771f26d103d5313d4d10fbfb3f41941f SHA-1: 27cf5dc0b958a6ba567a9a3c017929117905f96d SHA-256: e8f935f868c69cc11da0d93e9d383aca4fb3d19f8af807ac73d022daa0b52bd4
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to `https://ponafet.ru/strik`. The document body, though heavily obfuscated, appears to be a lure related to 'Char broil performance grill parts list', suggesting a phishing or scam attempt. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://ponafet.ru/strik?utm_term=char+broil+performance+grill+parts+list PDF link annotation
    • https://cdn.sqhk.co/fekolisuzub/iG0thg0/4475153739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5ff427304303c.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/chb7jb8/pc_games_more.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6036855f20241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_6026283a66f95.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/jijjjjX/55271437246.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/social_media_marketing_books_authors3l8rp.pdfIn PDF document text
    • http://letgtma.bid/the_wanderer_poem_sparknotes3fpto.pdfIn PDF document text
    • http://hotita.fun/asimov_the_last_question_summary3vmx7.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/agricultural_engineering_notes52hlu.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ibkybid/libikajotusabe.pdfIn PDF document text
    • http://francobusiness.com/60077705718qxn56.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://s3.amazonaws.com/juduk/68092970782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca40c778-f4a4-403a-9faa-1ea22e74bd7e/7404040369.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/54250182713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07710ead-ef81-4902-9bea-6a74eca3d46a/different_types_of_errors_in_measurement.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/27901973054.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/protein_structure_pogil_ap_biology_answers.pdfIn PDF document text
    • http://tamufigavoxi.rf.gd/zilezafatixiworatumotosiz.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/where_does_charlie_gordon_live_in_flowers_for_algernon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36555bd3-9cc4-4656-ae9c-46eac10be9a6/86517314820.pdfIn PDF document text
    • http://popewap.epizy.com/7093165244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e000bcdb-6c9e-433a-8dfc-3e5f88e103b8/kenmore_appliance_service_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/koxedavogan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c19803-b5ac-4009-805f-f5324449dcbe/wuzajenazeki.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/holt_mcdougal_algebra_2_answer.pdfIn PDF document text
    • http://limedebenilaz.rf.gd/theeran_tamil_movie_songs.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_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 5380 bytes
SHA-256: fb3a83ecd8f216d803c08b7c7c5e526cc70e0389b5a5357c4d2fefe6e6aa1fab
font_01_sfnt_off00010569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10569 11468 bytes
SHA-256: afe08766087138d3b2520e44879bfda23c4693bb8c9d4f5fdef7d6c75a4fe061
font_02_sfnt_off00012c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C70 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3