Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c1683e96ba71f0…

MALICIOUS

PDF

78.5 KB Created: 2021-03-04 18:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a8e2f972fc7e142e478d7f7a9e707a2e SHA-1: a67be9492d676bf721a5539c194635dcbb449bd8 SHA-256: b0c1683e96ba71f0e85121707a94440abf459ad0db82a52bbd172fc8d1023858
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also assigned a very high probability of maliciousness. The primary malicious indicator is the embedded URL which points to a known malicious domain, likely intended to lure the user into a phishing or malware download site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=the+management+of+grief+character+analysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_6028a6073a361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5fcab9c4d5238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600af0143d702.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/vepixogarigibenoriniwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_6016ed09cf460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_6005f233deb49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_603461264c190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_5fe751dc62ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fd7a454dc18d.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/english_idioms_list_with_meanings_and_examples.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/nitatotol/ultrasound_guided_lateral_cutaneous_nerve_of_thigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3867cbe8-61b4-4197-9edd-f09058699cc7/91099460143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c8c547-c04e-455f-971c-cdf60a0fe3e0/what_bible_says_about_marriage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee98851-fce2-411e-aaac-23142f2b2d1c/ikea_malm_black-brown_queen_size_bed_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/ielts_listening_test_samples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/gadewosivevogaroludin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5923f7d8-6599-4843-a752-93b377fd9322/honda_power_steering_fluid_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02199b0-15e9-4da4-8621-09181be5e00e/84661525759.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/74180919900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893a572a-d788-47f7-92bf-b232b4a01595/22613602309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1c03df-442a-4a27-afad-ecf0cde9f1c2/makefumusegow.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/suzumokopabipuratolewose.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_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5348 bytes
SHA-256: 60b775e41b86bcbb3b0f80a086c4ba7d9812403ceced4acaca6d8d75e7662fcb
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 10620 bytes
SHA-256: ddb6c6cb3126c03503f85740c3be786fc2b7e818ad4bcb7f95a338af6881eb4d

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