Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ff614570f12f83…

MALICIOUS

PDF

90.0 KB Created: 2021-02-22 12:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 51b72e48638c36b1cdc6da31ac5ff301 SHA-1: d429eb196fd3889803f608f2d3a557ab26832645 SHA-256: b9ff614570f12f832dd2365bd70ce7ce4b15992f7d5e4c66d1039ac027fd8d89
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The PDF structure and embedded content suggest it is designed to appear as a normal document while directing users to a harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=codigo+ascii+para+signo+de+interrogacion+cerrado PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5fd23a47cad29.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/mhfjfkH/adidas_yeezy_slides_red.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_6015d6405c0c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5fe9ee16d055b.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/ZjhnhcH/zombie_smasher_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fccb1e115cc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fd07735ba505.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/gfKgdlK/all_creatures_great_and_small_2020_cast_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/ujaoLid/the_eyes_of_laura_mars_movie_cast.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/wupixufekijax/semi_formal_dresses_for_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/bansko_ski_resort_information.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/romiwuxunavab.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/moment_hh_mm_am_pm_format.pdfIn PDF document text
    • http://wegatanubuguze.rf.gd/how_many_calories_are_in_a_grilled_chicken_burrito.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/angular_material_side_menu_template.pdfIn PDF document text
    • http://vuxujakovonad.epizy.com/palm_beach_gold_coast_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/nanewufeluxutiwefirixa.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/mafipujemijivawosev.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_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 11860 bytes
SHA-256: 55aeca3892573883029289bc87475db62f150ed31b3fd16cd6e11d5b65442663
font_01_sfnt_off0001153d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 5116 bytes
SHA-256: 01a0fb0669708693fb2598912e6f844bf938e7b126056c14e970d58a15743092
font_02_sfnt_off000126b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B3 16340 bytes
SHA-256: ec975a453e9598bb36a6375329c0536702f8782ad0eaaa370584f20c288c7956

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