Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ebb2e44bfc521b…

MALICIOUS

PDF

86.2 KB Created: 2021-03-28 19:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca202c1b68534ec20c9a0c58506d84e SHA-1: 51d514d14a5686c72e28f84b3e43fca06c29183b SHA-256: c0ebb2e44bfc521b1e36a9abcb8d824fe625cb3e45841ac78d0d7ced61834fb6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high ML classification score, strongly suggesting malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the primary attack vector appears to be the embedded URL designed to trick the user into downloading further malicious content or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=ador+welding+electrodes+catalogue+pdf
    • http://rivezetufizi.iblogger.org/how_can_i_find_a_long_lost_friend_for_free.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_60209df7cbc50.pdf
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5fc7f93156204.pdf
    • https://cdn-cms.f-static.net/uploads/4384480/normal_602fde731a833.pdf
    • https://cdn-cms.f-static.net/uploads/4445331/normal_600a830c30483.pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_6057c7b16bd1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e3933029-aeb9-4b68-ab33-5de80e040918/how_do_i_know_if_someone_viewed_my_facebook_profile.pdf
    • https://uploads.strikinglycdn.com/files/9a512d09-ca42-43d2-92d5-5db59036aea4/what_to_look_while_buying_second_hand_car.pdf
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_534bb12ac7e54fb8b7788b4780aa2a12.pdf?index=true
    • https://5741878b-e18d-4492-8bbc-c4e6c6b1c8bf.filesusr.com/ugd/e5a943_14228c343ef743bfbc81a4e8ba3250c0.pdf?index=true
    • http://poxemibusap.epizy.com/join_files_side_by_side.pdf
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_0174aa555168497b929ea2db1c17b9c9.pdf?index=true
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_7478f8a0b9ca49ca9939a9af4853c3e5.pdf?index=true
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_59e99ff037d141c6a492db82bb772a97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/46778180-6bc1-405c-8881-bf805a60086a/36672958788.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_09e5a8d89d3f4ac0a969376e4e56ce5c.pdf?index=true
    • http://tunawumananedi.rf.gd/hampton_bay_ceiling_fan_light_not_working.pdf
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_d2b1db88500b43f087f44c32a8f71e07.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c4fb039-cf12-41cd-aa45-ebb2b1ab51ed/dinufegidovipezipa.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd93.bin
ad5bf7e9dae0120aaab8f9ee9fd189cd21a3668e7c1e88e90d40d84cead500c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 5404 bytes
font_01_sfnt_off0001101a.bin
e9f55a546d23070aa5b818f6343df1a2b84ad91083ee2a86b2a49b0953a817ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101A 10964 bytes
font_02_sfnt_off0001356f.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 16164 bytes

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