Malicious PDF — malware analysis report

Static analysis result for SHA-256 82062be1fc36381a…

MALICIOUS

PDF

70.2 KB Created: 2020-12-24 04:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fbb1610093cdb57802ff2927aa0332da SHA-1: 1685918175f84ed5906a6a2ab458b7a94a4d70c9 SHA-256: 82062be1fc36381afa09e3a8f2c282157faee2ea9d7fc4b969cee5ff55f8e942
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/strik?utm_term=capsule+pharmacy+nyc'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=capsule+pharmacy+nyc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f88845a6724c.pdfIn PDF document text
    • https://cdn.sqhk.co/wepuvumug/ibxhagc/51308456976.pdfIn PDF document text
    • https://gilezetekeno.weebly.com/uploads/1/3/4/5/134596926/9832836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db68ac84-04c0-4b4a-a89f-2bb2def6dc7d/tamil_hd_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8cc747e-e96a-4731-8fa8-ba49c7fd4963/53506419488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c191be4-6466-4933-b9f8-793cbfc8c9f1/13108464222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f0e980-06de-4a15-abdc-3f3eff8c21b3/zatavoxenoxavu.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/84665951493.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/animal_crossing_city_folk_insect_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657c36db-70a9-470f-b561-3dcd2609666c/study_skills_curriculum_for_high_school_students_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d7cca3-f32b-4e19-b58c-72bb914a8fb2/kinivo_btc450_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11ca959-2992-4d70-a528-a3aed39c0762/43543517613.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_off0000d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 5180 bytes
SHA-256: 6531767a682e655901c81214012c8d74f7bb4e1ee5e07e2b7cb5fe63a318a1ff
font_01_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 10824 bytes
SHA-256: 72f51d62ae21789f4a644efa90d912ee87a24fb2b2a167f574f333f14505509e

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