Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3232068a17d8a6b…

MALICIOUS

PDF

80.5 KB Created: 2021-07-03 00:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d1f6e49934610fa1bad5aeae91eae64 SHA-1: ae6e0404d23f5da617ede0dcf5899278166d0d86 SHA-256: c3232068a17d8a6bdc4c6cbc3b789eef25e965bc5021d5a002b49232883d2b30
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be to distribute malicious content or phish for information through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6df842ce6---rasuvakariker.pdf
    • http://techsystem.gr/data/uploads/ckeditor/files/18869489200.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb236cc793a---xawuvegetotuxogemunuxoxun.pdf
    • http://rotang.net/userfiles/file/dewakefozuzuboritakuvufu.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0958726a0---goruwidikasaw.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b92d9c0922c83015700ed06cc6b17bd5/sofunotazilejofilibizur.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/45210393784.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3b960f1ae---jezis.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/nosurujilezowadiludixupi.pdf
    • http://aaaexpressac.com/userfiles/file/pexaferipudilufilixoki.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/478ab784496596be5f90327493026b8c/48414296364.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/hn9hiofq7r7lsb3hs35ahrd642/39243000857.pdf
    • https://armagedonspedycja.pl/files/file/22507293388.pdf
    • https://media-get.com/userfiles/files/sofewixiguniresigimevo.pdf
    • https://blokhol.com/upload/files/99908662920.pdf
    • https://ienter.bg/files/tebox.pdf
    • http://langeline.com/ckeditor/upload/files/kisisafapowuwi.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070369ec4689---zazonifipop.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867451cc5fe---6105998991.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a153a02dd07---68831239676.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/mbnebp62f5t5kc72u9iagr860c/zakubepif.pdf
    • http://bahattinburyan.com/userfiles/file/86394290098.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdaca58c45---45091947091.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/e02f0526b4413fe82556928ec453be7f/49044967501.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sms+ringtone+download+pagalworld+mp3
    • 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_off0000be94.bin
5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE94 16684 bytes
font_01_sfnt_off0000d632.bin
bbdaede64a0283e2fb3dde61f2bd6456d99333aac43bbd32daa230c39741d23d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 11068 bytes
font_02_sfnt_off0000efc7.bin
6770c14d8e9efa5691bc46fd2baeea31682ed265f97009417b333b639534d811
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 17072 bytes
font_03_sfnt_off00011bbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 16792 bytes