Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6164aca5d5f550…

MALICIOUS

PDF

60.4 KB Created: 2020-12-07 16:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fc9390ff16b1254cf88b0bc50a03749c SHA-1: 6b3d349d875b637c56d10f0a77ade51e36e707e0 SHA-256: 7d6164aca5d5f5504dff910db4b16537e6bcbc2f03708f0552940bc5fcedb79a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'https://trafficel.ru/123?utm_term=vera+wang+rings', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the malicious URL and the PDF structure strongly suggest a malicious intent.

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://trafficel.ru/123?utm_term=vera+wang+rings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fc93f9002f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8700dda5834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc53c1cf7cf8c7540473628/t/5fcc2ee4d336b863f0b3b248/1607216871966/darts_club_pvp_multiplayer_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5e5b5a-ebf6-46b6-81bf-ee931ecb52f7/istrolid_campaign_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/drakensang_online_class_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b3b1c9-c73d-431b-8636-527de179a123/toy_story_personajes_nombres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597567bd-cd4d-4b29-8963-7e09d0508afe/rf_tech_weather_station.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c21c504bb4653ce0bdb8/t/5fcce5ca6f0099009e63b8cf/1607263692507/zazokeradogapara.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc663aacb3e0f57712aefb6/1606837164396/there_you_go_is_this_a_dream_drake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3565184-f740-4faa-96b3-bb37a361eb92/blowout_rachel_maddow_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf421b4c4d833b8bcbc4d/1606218787020/ric_flair_dead.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/pofovogafarajirawuge.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/triangular_arbitrage_rings.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/classeur_grand_format_a4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bc1334-8fb4-4983-99f2-043068b1b194/24156271409.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_off0000b243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB243 4876 bytes
SHA-256: 662e5b7a2286e45d6545823d20ee90d82b09231b974c0d35975e81ed54f86ee3
font_01_sfnt_off0000c300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC300 10136 bytes
SHA-256: d16470f05e783ff29eabf24c9ab597e6a34065fff30ca7164c0877e397c7a241

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