Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c60e271ca48c7d…

MALICIOUS

PDF

72.1 KB Created: 2021-03-27 22:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aeaa2a0f5d23de49da0acd4e83d021be SHA-1: 173249d539bbaa8bb644a97e39f06a6c77195d50 SHA-256: b3c60e271ca48c7d8e54a8c72985a6cd6e0c2e839e45447c92ee9d6b03d459b5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs disguised as download links for manuals and drivers, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the presence of many external links suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/wix?keyword=truck+repair+manuals PDF link annotation
    • http://astropsychology.website/asus_usb-_ac53_nano_driver_download05go7.pdfIn PDF document text
    • http://muldwych.com/69938800299avmx8.pdfIn PDF document text
    • https://tejiwubatimi.weebly.com/uploads/1/3/4/8/134899102/3073120.pdfIn PDF document text
    • http://cryogen.me/cheran_pandiyan_tamil_songs_free4zxmv.pdfIn PDF document text
    • http://formblckr1.xyz/general_warranty_deed_template2rkrj.pdfIn PDF document text
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/3523867.pdfIn PDF document text
    • http://vanlit.ru/646398857491q1b.pdfIn PDF document text
    • https://mopamosaxute.weebly.com/uploads/1/3/5/3/135322262/7d4ad0e49829a.pdfIn PDF document text
    • http://bitcoins-profits.com/rogapu9q2ak.pdfIn PDF document text
    • http://wordsidepost.top/bozidarepoxisetubesoewy56.pdfIn PDF document text
    • http://getdouche.xyz/nedulirotozivukapofarij37kd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416929/normal_604f7acc49d08.pdfIn PDF document text
    • http://losinglotterynumbers.com/zumidobobiribanabavata7xxl5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6040da0f94518.pdfIn PDF document text
    • http://profmaster74.ru/focusrite_scarlett_2i2_review_2018dm6gp.pdfIn PDF document text
    • http://fartook.online/math_practice_calculations_with_significant_figures_worksheet_answers33sbl.pdfIn PDF document text
    • https://lepifopinitomo.weebly.com/uploads/1/3/2/6/132696280/zegafenewibef.pdfIn PDF document text
    • http://7gusevshop.space/volunteer_firefighter_training_schedulei209g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_60326798e1d2a.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://uploads.strikinglycdn.com/files/ae79c4dd-eed6-4922-b8bd-97647b7efdc9/3rd_shift_warehouse_jobs_hiring_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3af860-c057-4ff9-a2d9-17f236ce1d98/how_do_i_contact_whirlpool_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4f1d2c-2d17-49ff-8839-df9a8675253a/2003_ap_literature_free_response_question_2.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_off0000d369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD369 4784 bytes
SHA-256: 52a34733c163a9b23b8226f78a41a451cabc6f52013fed5656db88bfc3d9cafc
font_01_sfnt_off0000e386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 9856 bytes
SHA-256: f11af35d04f9671d442f123a59ad4f59a7ef8f279aaa88958f023156ea9af204
font_02_sfnt_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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