Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba08b32f3592d07…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 01:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0ff4fd336733533e79317238cd661f33 SHA-1: de920b423d710b5307f58905161208c84119c9c8 SHA-256: 7ba08b32f3592d07e91c26d8ff2c8559160cdaf9c5979302366d9f509c055d7c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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
  • 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://nipisod.ru/aws?utm_term=their+eyes+were+watching+god+chapter+10+quotes+explained PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370294/normal_6001389f0fc9a.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/bosch_500_series_dishwasher_issues.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_604de8abed7df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_6004efa3a5138.pdfIn PDF document text
    • http://1xbets-reg.site/wanof9r47h.pdfIn PDF document text
    • http://meblik.su/77296908255hdgs3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5fcb651e821a1.pdfIn PDF document text
    • http://termo-nord.tech/xinonuvonuburujivibaji3n17w.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/how_to_program_my_remote_garage_door_opener.pdfIn PDF document text
    • http://shoop-fm.ru/echo_weed_eater_srm_225_spark_plugtv03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5feb85e771b84.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/dopeboli.pdfIn PDF document text
    • http://koolmaxt.online/994337836640xsea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445107/normal_5fdd17fd2c54e.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/b34a3228-346c-408e-b8c5-a8c68a953d55/kozuso.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/84837446255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2050dfea-e4eb-4088-9534-f066366a50e0/delmars_standard_textbook_of_electricity_6th_edition_instructors_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/87696036630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306a77bc-d113-4323-b33d-59535254b5a5/safety_first_car_seat_forward_facing_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a294562-40b7-4fbd-bb2e-5fef0be71fb2/modunaseripomige.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/62104136610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86f7df0-0ccf-4240-9af0-c92bb7edd16b/why_is_my_paint_spray_gun_spitting.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_off0000fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 5864 bytes
SHA-256: 2c93e9f1941cb1a674bd208e212d5e159d0a60703b4095fa463b8685076b146c
font_01_sfnt_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 11204 bytes
SHA-256: a1e63b99a542a21c8285707a46b0d2c27cadd7b214e67cfb856476227651563b

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