Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ac08f8eedec2f5…

MALICIOUS

PDF

87.5 KB Created: 2021-03-18 01:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b3fa9e7d191be76df2cc6af352e5d698 SHA-1: dad3941678b46f19c5aa54047616fc530dc6963b SHA-256: 11ac08f8eedec2f523ac7fbf84a997df5b68f24be413cf4bc81a4f22a2b972d8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=geotechnical+engineering+principles+and+practices+2nd+edition+coduto+pdf PDF link annotation
    • http://saroforati.medianewsonline.com/prparation_et_peinture_carrosserie_auto.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/rational_fasting_book.pdfIn PDF document text
    • http://5gusevshop.space/calories_in_dunkin_donuts_cold_brew_with_almond_milkvu585.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jHZgfhf/lukurodo.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/die9Wge/41456960740.pdfIn PDF document text
    • https://xulexina.weebly.com/uploads/1/3/1/3/131398260/mebivetegined.pdfIn PDF document text
    • http://francobusiness.com/jopename0wws.pdfIn PDF document text
    • http://copyright-central-media.com/definition_of_apothecary_in_to_kill_a_mockingbirdstnkw.pdfIn PDF document text
    • http://martakkord.ru/japawozm39q.pdfIn PDF document text
    • http://hiziryigit.online/workout_plan_for_gymgccvs.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/gufidibabimij_mojowevilunivo.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/34318531663.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/zatazewoz/82460882428.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/printable_periodic_table_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/botig.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/what_is_the_best_drug_to_make_you_happy.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/where_im_from_poems_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/why_does_smoke_alarm_blink_green.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/blitzkrieg_2_free_full_game.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/24168510418.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/ditubivesenegegotalax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11603 5580 bytes
SHA-256: bce4af92a1704a7c2a24a58bf43d6c770c006870507d21ce3badfce7ec11ab99
font_01_sfnt_off000128f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F8 11552 bytes
SHA-256: ee6a7114125ae869216ad81e1a591e3dfb78268dfca00a80bd9a8973cdf31bf2

Open this report in the interactive analyzer, or submit your own file for analysis.