Malicious PDF — malware analysis report

Static analysis result for SHA-256 945a9ca108373fa8…

MALICIOUS

PDF

80.0 KB Created: 2020-11-23 17:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd1a8802174edf6e393e22d34b2a9d41 SHA-1: 73c2abbb24928a0e3e4009a78852e24361a5d3ff SHA-256: 945a9ca108373fa813325ca0fd630841195fd254aaebec2fb73f90db654478ad
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafficel.ru/123?utm_term=cherry+fluff+salad+with+marshmallows
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f883f661f28c.pdf
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fa8496e6d0e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/matogapibelifiv/kenmore_washer_model_110_owners_manual.pdf
    • https://s3.amazonaws.com/rokuwapesu/tebepimululofidefis.pdf
    • https://s3.amazonaws.com/fidefofudi/vupejafuruzez.pdf
    • https://s3.amazonaws.com/lorugipopuxe/98017283706.pdf
    • https://s3.amazonaws.com/lanowilovuviwib/79102909067.pdf
    • https://s3.amazonaws.com/gebaxovudofe/how_to_make_plaster_in_blockheads.pdf
    • https://s3.amazonaws.com/gupuso/votoxunamoroxa.pdf
    • https://uploads.strikinglycdn.com/files/d88e139f-7afd-446d-becf-a8599f582563/87089110020.pdf
    • https://uploads.strikinglycdn.com/files/e348e8a4-ac1c-4c40-839c-2eb2cc3dc73f/fabejid.pdf
    • https://s3.amazonaws.com/rimepusox/98772344039.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c81a.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC81A 6440 bytes
font_01_sfnt_off0000d80f.bin
da434a4b29b4c175ae4188f8f2f7f9261fa4d1e96bc5529a278aa0466da9b47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 5140 bytes
font_02_sfnt_off0000e9a6.bin
a7f6155a7ec8c5c9e271055be089c9822f894e918a7a1b2e53e725d77842398f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 10616 bytes
font_03_sfnt_off00010e29.bin
17f4de92c7a3bbb5a9186b5540cb7e6a4181f3de54754bcdb3ad270fce1707d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 16316 bytes
font_04_sfnt_off000123cf.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 4324 bytes

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