Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66b849c6d3e063c…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 12:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bf777a77aef61a1555ce3d975c591fd SHA-1: 62fdd57cccaff8aafc45d095aa41980fb90d6a6b SHA-256: d66b849c6d3e063c4e49f11ae760e575e8d0bde7a3f2f47e5f5a0512e27d64a9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, contains text suggesting a lure related to 'blacksmith leveling guide vanilla wow'. The presence of multiple external URLs, including those hosted on Weebly and other file-sharing services, indicates an attempt to direct users to potentially malicious or spam-related content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=blacksmith+leveling+guide+vanilla+wow
    • https://nobarolibefo.weebly.com/uploads/1/3/1/4/131407117/digigorifonop.pdf
    • https://goresizusozal.weebly.com/uploads/1/3/4/5/134524816/cea40d7db3ba7.pdf
    • https://cdn.sqhk.co/zafilivopupu/ihwicwK/diderametopebixa.pdf
    • https://cdn.sqhk.co/wevexifimur/hjibji9/ombre_dip_powder_short_nails.pdf
    • https://cdn.sqhk.co/nevowokazem/crqhhgj/forming_adjectives_exercises.pdf
    • https://cdn.sqhk.co/posebozej/W7FgdAn/10193210057.pdf
    • https://cdn.sqhk.co/fagisuxupinu/eShaJ1H/homeschool_schedule_ideas_kindergarten.pdf
    • https://cdn.sqhk.co/fefamuve/jhgjjIa/lozuwegusumiralaseze.pdf
    • https://niriretof.weebly.com/uploads/1/3/4/4/134488174/simowewujawutafuzowo.pdf
    • https://cdn.sqhk.co/buzosefif/jf3qhf4/space_hd_live_wallpaper_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_5ff6f7dbbd1f488b9e651f85734f2b80.pdf?index=true
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_82bae994f9e74cbbaa917f0bf7d2375d.pdf?index=true
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_2aa0b0e286ad409c89f51c754e1040ea.pdf?index=true
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_4e45907b46d3472e8d970995f58c65ab.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8325ae2d-5a3f-4fbe-9e6c-6930edf308f2/ethical_hacking_jobs_entry_level.pdf
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_92ed2e3e6a9341e983758cbe26e8e667.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d52aeaa2-41aa-463c-8da1-02320a48f971/how_to_use_a_plug_in_timer_switch.pdf
    • https://uploads.strikinglycdn.com/files/e56619f5-4b5e-468d-b840-052ea0a18017/panasonic_sa-pt950_troubleshooting.pdf
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_06b796746f504c1e9640296b0425e6a9.pdf?index=true
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_6650138f2739453a9013cf0a3799f53b.pdf?index=true
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_5887401f54c74da1a33ac10e9b3ae723.pdf?index=true
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_bee8f5893c8140a0af04e2afa41d6250.pdf?index=true
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_63ad87687a354c2bb459122808740b2a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a3cdc082-6e87-4d3f-8216-029d4cdd88d8/pride_and_prejudice_jane_austen_book_summary.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f340.bin
6b1aecc992f92a2060799a30aafd56f34be85af356141866854dbc28b385f04c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF340 5520 bytes
font_01_sfnt_off000105fd.bin
b09d8e4417b7663f2dadbb1badc41120c9daa0b755dfcee0c8a6ceff84e6ea9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 10776 bytes

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