Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ee886f1fe9c970…

MALICIOUS

PDF

84.6 KB Created: 2021-04-01 19:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d31aa26c5f4474d6b6e84405a707930 SHA-1: 12267f766aaf22b395a0dbe0ced9e1e8d2157643 SHA-256: 66ee886f1fe9c970fbacffac7ee29e87843bd76a432c3cc6aad3f061fdc88391
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=belajar+bahasa+arab+cepat+pdf PDF link annotation
    • https://cdn.sqhk.co/porosobof/kPKhhQG/80600030385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_603a853692efb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474231/normal_6005ba806bd08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_600185d615772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_603956401c8f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5fd729f9d012e.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ifhdiaI/61363646210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_604a527e52add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_6038e245b0767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_602b098800bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_6043065f55cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60443f205ecf1.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/c671c76f-80ce-43af-80aa-543d30c72777/evenflo_convertible_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7127039b-3b9e-46c4-a808-b0a87155e496/trackhawk_on_gta_5_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/govekemo.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/7948879042.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/android_headphone_jack_pinout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dc564b-78cc-4976-a91f-feafcfac724b/91709785230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0271fd-070d-4a6c-9412-4afa0622d848/najafefafe.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/door_name_plate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/graco_magnum_prox7_paint_sprayer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011b54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11B54 23708 bytes
SHA-256: 16fb5190a57b6499c50c1b52ea16bfcdab2bf7e010c600668760baed5cd80bf6
font_00_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 5508 bytes
SHA-256: a71308387f71c207753a32f2821405a1d2f51115de3f53dea8f331caefcef76b
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 10672 bytes
SHA-256: 04f46fe8700cf74de27c79e34a66b5bb20bb57bd3c82cc1e37b75d8ad149766c

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