Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7f3273839aa58d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 07:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd20bf2bd5bf25c6593a8f954fcfb60 SHA-1: 9f05061728a0d28397a4120d089eac074523a200 SHA-256: 6d7f3273839aa58d3f5cfbe92936164e430b8ff7504ab44663c46118cc89d9bf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a site offering a 'free pdf download', which is a common lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=love+must+be+tough+free+pdf+download
    • http://snapchat-alert.com/catbird_seat_legal_definitionvmoyj.pdf
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fe003b400014.pdf
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5fe9f1e87b0a4.pdf
    • https://cdn.sqhk.co/ditetona/gsxkig3/kimeku.pdf
    • http://electorat.org/resiburokabogobefololawoskvou7.pdf
    • http://uspeh.icu/positive_mind_meaning_in_urduyj76i.pdf
    • https://cdn-cms.f-static.net/uploads/4491151/normal_6046daf6d0928.pdf
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5fd96f2326c5c.pdf
    • http://ductsunlimitedins.com/starting_a_low_carb_diet_planxuv6x.pdf
    • https://cdn.sqhk.co/feduvefas/jdCbUJB/lasidunolafaj.pdf
    • https://cdn-cms.f-static.net/uploads/4416930/normal_6028f19d2fd98.pdf
    • http://sevezor.scienceontheweb.net/11748983750.pdf
    • http://gejedesoni.getenjoyment.net/telugu_panchangam_january_2015.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2c259fc5-4241-42f8-a7d7-234f05bcbc88/57380753644.pdf
    • https://uploads.strikinglycdn.com/files/a97fc638-0069-4711-a908-79d2a53b1d8c/10777404283.pdf
    • http://vapewokadovusa.myartsonline.com/java_bangla_tutorial_free_download.pdf
    • https://s3.amazonaws.com/subopukomanaw/2017_ktm_rc_390_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/c82895f3-3b87-4920-8594-9bc3f5f48cf5/rejuzesemavamiwumevudolit.pdf
    • https://s3.amazonaws.com/gixawetopoli/security_guard_log_book_template.pdf
    • https://s3.amazonaws.com/vavebufevodutob/19394119952.pdf
    • https://uploads.strikinglycdn.com/files/c4fdd3d6-06e5-483b-82b0-3f0883efb8b7/how_to_use_conair_travel_steamer.pdf
    • https://s3.amazonaws.com/legenapi/figiwukugurir.pdf
    • https://uploads.strikinglycdn.com/files/91588270-f3d1-44b7-9753-aa6beacc4d30/what_are_rational_and_irrational_numbers.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_off0000dc37.bin
122b16ea8d1ca171f16e3179aa05688b29d5a7c7717ff70bc7cbcfd5ca406df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 5520 bytes
font_01_sfnt_off0000eeeb.bin
eb6375ca5829fdae3da7a592e77e36e787b1dfa2f60b6712bfea0129481bda0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 11304 bytes
font_02_sfnt_off00011549.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11549 4324 bytes

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