Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30a97c1099f9650…

MALICIOUS

PDF

87.1 KB Created: 2021-03-20 22:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31dbc7c2c638be65fcc1ccd30dc27d0d SHA-1: bc388706ddb63089041baaa6ef0bf5f906652231 SHA-256: b30a97c1099f9650e91e37a5f2091ada73de2244e28698343e70f9f9b6324937
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 phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Stihl 025 chainsaw parts manual'. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=stihl+025+chainsaw+parts+manual
    • https://static.s123-cdn-static.com/uploads/4489441/normal_600477897ce00.pdf
    • https://cdn.sqhk.co/rorifugera/nQidiaf/city_car_driving.pdf
    • https://cdn-cms.f-static.net/uploads/4390659/normal_604a0ed2dfebf.pdf
    • https://cdn.sqhk.co/jigugabopu/hajhqgc/67726137560.pdf
    • https://cdn.sqhk.co/vanewano/7bhdud2/32632334607.pdf
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fe63b852fed6.pdf
    • https://cdn.sqhk.co/duxadikoti/HMQjjhj/32614730344.pdf
    • https://cdn.sqhk.co/kefiruge/fjdicKD/70906666375.pdf
    • http://gugezebaz.mygamesonline.org/convert_to_dwg_autocad_file.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_e5bd455de8cf4f23bb41b7ca8aca02d3.pdf?index=true
    • https://s3.amazonaws.com/wogikokuzotaxa/lego_batman_games_for_android.pdf
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_22851eabd1df432ea4c73d3f1cfac66e.pdf?index=true
    • https://s3.amazonaws.com/davolazupivowi/salon_gift_certificate_template_free_printable.pdf
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_ed57beaf38a34b04930865abf0687033.pdf?index=true
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_fec2d6ff044146acbb98d1366a23509d.pdf?index=true
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_9bb37e8ccabf4f6ea753023d2bac061d.pdf?index=true
    • https://s3.amazonaws.com/savifin/how_many_calories_are_in_a_subway_sugar_cookie.pdf
    • https://s3.amazonaws.com/lanubili/xivakepa.pdf
    • http://muwuvago.atwebpages.com/68669053191.pdf
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_396a52baec0b4233b655bd51f3c7bbf3.pdf?index=true
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_498815323e1042d89d9d0a8b79f3fcae.pdf?index=true
    • https://ce5d016b-e5fb-4004-af8f-35f61b829e22.filesusr.com/ugd/d7d7f8_7ce9f741ef0046369d59e39a63296be3.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc91.bin
4368da8c683841471c79f5fffbeeaad61b3e67e426220b501d2a5b4b595a4356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC91 5768 bytes
font_01_sfnt_off0001101b.bin
5465e7db47f5029d0d486b67c0a9d4fdf234f0d493847bf5409e4f7663c4dcbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101B 12224 bytes
font_02_sfnt_off000139ae.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139AE 16092 bytes

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