Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c04e2013713ecd…

MALICIOUS

PDF

87.4 KB Created: 2021-07-29 22:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec208172d6e667a8f1f0a40323fdbeb2 SHA-1: 539655c4215446a226ae5d5fd20b039d1c458258 SHA-256: b0c04e2013713ecd064d70f78547d315faee5333c56845f7aa07cbfc885eaa47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and other domains, likely intended to redirect users to malicious content. The document body is unreadable, but the presence of numerous links to potentially compromised domains strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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 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 http://orchid-daikanyama.com/userfiles/file/tujuxamusodudevun.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d398ed57---22563351846.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e5da76107a89870b0f88509a4baf7b4a/94907680110.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/84920980775.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/xekipodabenalimerixiba.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/940b4e33c55d1dfd64cc6724298bce39/vobulitig.pdf
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/1117530859.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/d64de7f81101fe49b360fa41b6f57e26/fozuwite.pdf
    • http://secureyun.cn/uploadfile/file///2021072415052473.pdf
    • https://pharmalogindia.in/ckfinder/userfiles/files/81009157304.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12308e0f7---sazogusokoxe.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/2b2ce46078333a391ac7f496ef3cc833/zijeredel.pdf
    • http://highendschmiede.de/highendfiles/file/viveguxol.pdf
    • https://abofahed.com/userfiles/file/vumosevon.pdf
    • https://walkandsmile.com/userfiles/file/defupa.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707455f98f---mejolilobarekif.pdf
    • https://heyratacademy.ir/file/wixixavevomevilewev.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/larofetasiku.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/oiv6gqrq4jrevrko2qbf05ed5k/34926467633.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ab4e63372---99719384264.pdf
    • https://siam-royal-view.ru/data/files/66556697437.pdf
    • https://artbynela.com/uploads/file/xewakipomapuwulox.pdf
    • http://royalrep.com/userfiles/files/95416185603.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d85fc20e3---6507357034.pdf
    • http://zafirkort.com/uploads/files/84267991083.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/e1e842787bac2866528e6ed20bf83c62/26012325956.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+reset+keypad+for+craftsman+garage+door+opener
    • 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_off0000f172.bin
fb09d49cd7cd30d4020a8d43432f9250eb96b62f71282ee8601680ad3450c141
pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16576 bytes
font_01_sfnt_off00011c9b.bin
773231b4a5c1eb5efccba6098f290a6dc50d11bb116b494ff77ecc43b6505fc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9B 11108 bytes
font_02_sfnt_off00013671.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13671 16792 bytes