Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5aa533a4488579…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 22:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4008808f25636925f68d8033028aec2d SHA-1: c4cb16ae62af71c4668030e2bc31c5d89415de55 SHA-256: 6b5aa533a44885797dde152d9dbd8030c576b25abb7b1a20c61995008040d545
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lottery winnings or parcel deliveries. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect the user to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=how+to+make+circular+text+photoshop
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/2ubi3e2lvd8u9dj3buhts2ker9/48654004145.pdf
    • http://tamker.hu/userfiles/file/wabajosejiridejosuz.pdf
    • http://moon-villa123.com/CKEdit/upload/files/fiwifamijowumibavaru.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/voriviponevoneloxenev.pdf
    • https://fullmagicweekend.com/ckfinder/userfiles/files/30741909139.pdf
    • http://dakmet.pl/upload/6299483302.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/469a30cf993cbe68bc0220e97838c80a/fozotonoberorizadobubaz.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7f6853a3c---xovij.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5a7aeebaa---vobalisukuvuri.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/b8eij33idf7qpk7h0ppg792d9o/jedat.pdf
    • https://lenaoyunlar.com/calisma2/files/uploads/31786395358.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7e78bc7a---mugedexezidike.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/5ahakl2v8bou6kkadq7mpb98p7/81763498916.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160711b3ecb937---rabulusutosixon.pdf
    • https://affordans.com/ckfinder/userfiles/files/4548326438.pdf
    • http://videofilm-tv.ru/content/File/dokigejiwarinixus.pdf
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/70032356954.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607805bf96217---zufimosefeludejipel.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160843da9d9716---46777848810.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083843562741---85635742433.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://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_off000104b1.bin
4dafc1acef6fc093c6c87f10a5be103e282ea2d70edcfa6675ac64e61f721cee
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 10904 bytes
font_01_sfnt_off00011df6.bin
2925aa4a0248fe4239cc8b7c6c038f04a8e849487a116b4e17795058dc0143e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF6 17408 bytes
font_02_sfnt_off00014b98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B98 16792 bytes