Malicious PDF — malware analysis report

Static analysis result for SHA-256 12918305477a2836…

MALICIOUS

PDF

78.4 KB Created: 2021-07-05 16:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d06e12c78f8e0871d7543565ee3bab4a SHA-1: 0eeaffa560028c586cb3f64ad1a2e39aab55276b SHA-256: 12918305477a283620be5dde7a5e14c45fa85c4ee3695d80c81642050a529067
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The presence of these links suggests the document's primary purpose is to facilitate the download or redirection to further malicious stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f293b0f049---lisexon.pdf
    • http://wf515345.tw/CKEdit/upload/files/94748059094.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/03440c46d786ea6d6dc51f6f3630ec7c/kediweparopadolifal.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087d10559398---10924578269.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2784a17332---kojawosawisemotipek.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608beeed85d4f---69324281046.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/l5ajrnqoshecjhvnt24ai4sqj2/vovixotesokokapegewow.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6e5e124a3---22589928721.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160878133ca7c4---71945059039.pdf
    • http://tuzvedo.hu/elemek/file/9057017758.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/90267453925.pdf
    • http://akinmedikal.com/uploads/file/dasezufepokozamunekumal.pdf
    • http://garderoba.sk/images/_file/duwuvuxenanal.pdf
    • https://floridainvestment.cz/files/file/xiteromeve.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b8005597b6299f175d5a9a091733a360/jerumajoxonegurodexig.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/42c03fe8624bf03b8ea5c49c719711bb/97367122628.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607852e61f5a3---61545072356.pdf
    • http://ambulanceservice.pl/userfiles/file/bagugoretejenaluboten.pdf
    • http://megat.pl/uploaded/fck_files/file/55441924437.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607638db25f05---dizorif.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e36b4b4c---57531878149.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/d36jc34ofkpa5mmgvq9d2llo38/waluvuboxajobaz.pdf
    • https://tiklatakip.com/calisma2/files/uploads/noxufixop.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/q7cvei943nt6gijtlh57ujc49v/11651742068.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=makarov+owners+manual
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb3c.bin
50fa6de7d3629d613a67fb0db196348424ca969b54064a657d07596da0b6f6e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 10416 bytes
font_01_sfnt_off0000d2e3.bin
6bb6faf7f731ae1adc8b6c8055741cfd25db7bbbb04597d66ea2eec7fe752737
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 16076 bytes
font_02_sfnt_off0000fcc9.bin
dc06733fb1b3e8baa4303a7b234726769048d67753183ec25fed266cd0fe6b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 16224 bytes
font_03_sfnt_off00011292.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11292 16792 bytes