Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2ebdd658d095df…

MALICIOUS

PDF

87.3 KB Created: 2021-03-22 12:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe3df7aefc7ea6d746fbb62b52d99ba9 SHA-1: ecf5c6eea5876eabe0d678963eaa7dd9519200d2 SHA-256: de2ebdd658d095dffea1efcac096bff3601d45ca3a8afd85afc9209b11a72539
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a URL related to 'eragon book 5 pdf download', likely a lure. The PDF also contains a large number of external links, many pointing to S3 buckets, which is characteristic of SEO link farm abuse for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=eragon+book+5+pdf+download
    • https://cdn-cms.f-static.net/uploads/4371244/normal_602635a593708.pdf
    • http://realnoe-obshenie.online/love_yourself_highlight_reel_piano_sheet_musicltsh6.pdf
    • http://robertferrell.net/weditepefewefimuzeziseb98l8v.pdf
    • https://cdn.sqhk.co/nuditufu/mkpicms/60901328572.pdf
    • https://cdn.sqhk.co/ruvuwoki/agegihb/pejepakezujakuragub.pdf
    • http://rankingcoach-apps.com/andrea_camilleri_books6l05f.pdf
    • https://cdn.sqhk.co/fasixazijaz/dhehjpK/mtn_ghana_momo_code.pdf
    • https://cdn.sqhk.co/pisimebuziz/hggfibx/35015849465.pdf
    • https://cdn-cms.f-static.net/uploads/4369912/normal_60172a05e7839.pdf
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fe8959fa8cb7.pdf
    • https://cdn.sqhk.co/fopavege/djaOVBZ/ableton_live_9_suite_plugins.pdf
    • https://cdn.sqhk.co/lozuzupadis/hcJQ41H/62721878338.pdf
    • https://static.s123-cdn-static.com/uploads/4469370/normal_60051f169e286.pdf
    • https://cdn.sqhk.co/dewozoju/iap9Uih/suxegamefimafige.pdf
    • https://cdn-cms.f-static.net/uploads/4408174/normal_604ef84ebf0eb.pdf
    • http://airned.ru/how_to_check_car_condition_before_buyingwcsx4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legobegutulo/insert_a_photo_in_google_sheets.pdf
    • https://s3.amazonaws.com/mukutud/goxaguvubinosuzorasev.pdf
    • https://s3.amazonaws.com/zedudo/93775246805.pdf
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_3afa3f0c86e34848baa04af74808f420.pdf?index=true
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_21f6903f42414acb8830a729e9b08701.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_0e9db7fcced242bea6c85220b02685dc.pdf?index=true
    • https://s3.amazonaws.com/xebuvuwov/bifakewirukisar.pdf
    • https://s3.amazonaws.com/mosezavor/67159411018.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_off000112c7.bin
e03c796ac9cc1f90e488a4a35b1877f0cb28e3c65af611d057b225560a154155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C7 5408 bytes
font_01_sfnt_off0001255b.bin
063c654d8492940490697a5a029c94159ca26d50e26bd8a7219027129896c906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1255B 12176 bytes

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