Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd88973ce20883a…

MALICIOUS

PDF

92.6 KB Created: 2021-08-23 13:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9c8940d244a29546a8cbbb68a0e6d77d SHA-1: c0944d8e2646d9eb44547d2fa154906ae07611b8 SHA-256: bbd88973ce20883a22a59b491931554864e9375b28b68dfbdb512025ec9fd234
164 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of urgency lures further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vetcasatenovo.it/userfiles/files/47789266873.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe056917ae---44547206611.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/19645857453.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aef3e61cd030fc8e34533472a79fdc6f/sakuxivorukuw.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/82351394872.pdfIn PDF document text
    • https://tantecoccole016.it/file/52896228169.pdfIn PDF document text
    • https://cncunse.com/d/files/34511947177.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/52139101354ae18389c1622e2ca7a5e6/98630018017.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/vs0ooi7r3leu5ego0leef2f5k3/pelivonebuworinad.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/damonarozavodumazafagezok.pdfIn PDF document text
    • http://darec.sk/files/files/vosefizedajasifasejeden.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729a6738590---maninuxeninizizes.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab9dc5a529---27886592133.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/lelewizitekowotemus.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/66b6b7cf3b3d3e9933fafc4846fa4948/21219880802.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/23072940207.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d7162e52e4c---foduwug.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/16114388250.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160af57b9a9fa7---40992492396.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/vowerutaxikeludojasari.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xusorajagowu.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/fojemujojun.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b8927832cd5db54f11581f6e49bbbd18/webejoropogon.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/cf439e81277f46d7bb494f9da62b7d59/jotuvogisutilububud.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/ro4i71pei7fs9ek5eia2fkv5ki/loluvuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=few+students+knew+the+answer+question+tagPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000147c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x147C8 18336 bytes
SHA-256: d60c682e6bf8833b285ea24e244cd6ed3a2a19fe5769d6dbc5b79e3632f78f9c
font_00_sfnt_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 10884 bytes
SHA-256: 87ab79f08cd3384fdafe9c723b11417742a7c600c6e12fbdc47252a9464633b6
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 17628 bytes
SHA-256: 9520c4c4e8aecc127427e3b7d5e7286a0db09183cc86ac753b8f5a2b4bc39c75
font_02_sfnt_off00012fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.