Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d9f3d78e75b52e…

MALICIOUS

PDF

84.2 KB Created: 2021-04-13 06:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b567ddd48c43dc932181a2209b2ee5cb SHA-1: 677a1c3870e2a5fa0e321d79e150d8d76abba1b2 SHA-256: 97d9f3d78e75b52e2c0fd567129acb8654dc36ad1c022a880bc395381aaa23f5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming attempt. One of the primary external URIs points to 'pelibifir.ru', which is suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=best+ruger+lcp+2+pocket+holster PDF link annotation
    • https://cdn.sqhk.co/gemesikexo/FjetDom/rewards_reading_program.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/fge2QMS/what_does_apple_spend_money_on_uk.pdfIn PDF document text
    • https://bugevokugado.weebly.com/uploads/1/3/4/8/134870551/sodonipeloje.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/VfwwhaJ/nomodanerusupizo.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/iihfo89/69814829493.pdfIn PDF document text
    • https://wujorimumoba.weebly.com/uploads/1/3/4/6/134676457/9063561.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/AVjcifW/75705581366.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/8306208.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/Kwiahdg/43664345571.pdfIn PDF document text
    • https://pinafizupefed.weebly.com/uploads/1/3/1/3/131380591/5457226.pdfIn PDF document text
    • https://kefagifugujog.weebly.com/uploads/1/3/0/8/130813645/dazibiwiza.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/qIgjijZ/vegopelefobemegesin.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/bupesejirijejus/what_is_office_health_and_safety.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/nupojusowa.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/how_to_disable_backup_buzzer_on_ezgo_golf_cart.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/aberdeenshire_council_planning_application_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/software_developer_remote_work.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/vuralatinavupija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4388de9a-d34b-44fd-b771-21c00dfd8a0f/54752755464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22d1cab-5089-43fb-9869-c09896046040/kilivagomekabelopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06f37fb-8b7d-4362-aa0d-d4ff72aac4ff/what_is_the_weight_of_plastic_ball.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/tapekule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1071e6-57de-492f-83d5-8af5745e9cf2/who_invented_chess_board_game.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_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 4960 bytes
SHA-256: fe4c31f0b960b607778db044c35d4cd956f32e7fbacc5911bdecf3ea85eba544
font_01_sfnt_off00010fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA3 11040 bytes
SHA-256: 76039bdc55cb966d7e0c84cf3cabc73f8b790f959c318da41a831480c98e1749
font_02_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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