Malicious PDF — malware analysis report

Static analysis result for SHA-256 56839f9999cb75b5…

MALICIOUS

PDF

73.4 KB Created: 2021-03-22 10:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83e7b47f9fcb383aab653c930539bd7 SHA-1: d56ab643529b91168ff13e63b159b3e3d52bee88 SHA-256: 56839f9999cb75b5e5fdc767313ab283fd43a1b05cb056fcfe2c5d48b7b88536
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a malicious domain, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection confirm the malicious nature of the file. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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://xezojetit.ru/award?keyword=treatment+of+diabetes+mellitus+pdf
    • https://cdn.sqhk.co/rotefuver/kXYiggf/brent_crude_price_live_in_dollars_bloomberg.pdf
    • https://cdn.sqhk.co/burexewejam/ijajbgf/enmarket_bluffton_south_carolina_hotels.pdf
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5feb180b6b645.pdf
    • https://static.s123-cdn-static.com/uploads/4412573/normal_60070c65dbb53.pdf
    • https://cdn-cms.f-static.net/uploads/4462985/normal_603d4b7cebd96.pdf
    • https://static.s123-cdn-static.com/uploads/4383680/normal_6003f084d5235.pdf
    • http://defokozixeral.sportsontheweb.net/basic_statistical_tests.pdf
    • http://mosebuzixat.mywebcommunity.org/analisis_del_libro_apocalipsis_de_la_biblia.pdf
    • https://cdn-cms.f-static.net/uploads/4386354/normal_60394d4cde0a7.pdf
    • https://cdn.sqhk.co/jugemito/ifjf0hf/rofikos.pdf
    • https://static.s123-cdn-static.com/uploads/4470038/normal_5fcb54269a522.pdf
    • https://cdn-cms.f-static.net/uploads/4472200/normal_60219b5463903.pdf
    • http://lukufogud.getenjoyment.net/gemabesutureref.pdf
    • https://cdn.sqhk.co/gibiganegaz/dBJtjaG/biografi_archimedes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/835a95d3-5935-46b5-892c-e1aba7070acd/vepodepoxixubokijakop.pdf
    • https://uploads.strikinglycdn.com/files/107cd457-7eb8-4c49-9e7e-54cd19367b7e/62427870462.pdf
    • https://uploads.strikinglycdn.com/files/cacf80d5-984c-443c-adaa-2971eddb5b18/21636757259.pdf
    • https://uploads.strikinglycdn.com/files/c9e10226-4fe9-4af2-8f8d-29361cbc92a6/stihl_grass_trimmer_fuel_mixture.pdf
    • https://uploads.strikinglycdn.com/files/7491a7b0-c1da-4edd-a5bd-cd874fe9edd4/98518693588.pdf
    • https://uploads.strikinglycdn.com/files/47dabb8a-5bc4-4ac5-b484-0e6d3170e970/17462645350.pdf
    • https://uploads.strikinglycdn.com/files/e1d843d4-c186-4d42-99f0-0171275ed233/kindergarten_math_addition_worksheets_free.pdf
    • https://uploads.strikinglycdn.com/files/8edfd877-f981-411e-b2c0-92c0a22f1571/22535255644.pdf
    • https://uploads.strikinglycdn.com/files/7be04ca6-c4f1-458a-8606-406d3f8c8ce9/69731963642.pdf
    • https://uploads.strikinglycdn.com/files/82dfbf12-2ae1-4b9f-944a-c2cc0fd3cf39/74665470586.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c4.bin
d852a89929ab97b93c2de04dcd6dacfecb471adf81f2b8c1710ca302c9a8907c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C4 5160 bytes
font_01_sfnt_off0000e72a.bin
97ab4af9a97a04728d26a4837f3d1ab73d87fb8d8648afb9ffcf55268561924b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 10080 bytes
font_02_sfnt_off0001099c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099C 4324 bytes