Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf7c7105eed8e84…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 19:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 05e78863380de7d7ffde73e69940d34f SHA-1: 8ed5c340f682c7ca21280d358c61b530f799988c SHA-256: 8cf7c7105eed8e84df5a3b0ad00af0b7a95f570d8482743ab7f0be1487280818
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm, with one prominent URL pointing to a movie download. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=wrong+turn+x+2018+full+movie PDF link annotation
    • https://cdn.sqhk.co/takepoladev/6wOqJgG/12842368377.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/history_of_benin_empire.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/spanish_definite_articles_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/ijBhdp5/florida_ag_sales_tax_exemption_form.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://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_6690e01910b6424e8b64fbf8a41ca4da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/jajavamifevobirumuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dec0c0d-a729-4988-8a89-995443af2d53/diablo_3_ps3_save_data_download.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_bf6ee4c23daf4f27ba9c2dc7b5ee0e50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1088ce3-ee30-41ea-a61b-0f6527118b40/encyclopedia_of_5000_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/which_artemis_fowl_book_is_the_best.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/gap_baby_girl_denim_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/69314576486.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_f479a16e6932463398cc0208dacb43d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisefowu/sample_investment_portfolio_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/what_is_ethical_hacking_in_simple_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0961ef6e-eaa8-422f-beb0-5fe563787c5b/does_costco_sell_hearing_aids_in_canada.pdfIn PDF document text
    • http://pezamax.myartsonline.com/signs_a_guy_isnt_interested_in_you_anymore.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/harry_potter_and_the_goblet_of_fire_book_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd509c32-47f4-4590-8869-b95eb2f20061/22257933001.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_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 5244 bytes
SHA-256: ca658aa57571c1981a3ed0175a1d6dd5a4549f199a108bce10588e39b97765bc
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 10536 bytes
SHA-256: a86f818a4574db630aa37c253467d96d00a9b4582a78cf7d9ac9ea6acbe97e57
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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