Malicious PDF — malware analysis report

Static analysis result for SHA-256 529e0de47705a65a…

MALICIOUS

PDF

84.7 KB Created: 2021-06-25 17:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5233bf13dec6a0752333ca52197caa97 SHA-1: 9517083c945edf2f0584b7268674f3e7c2371c86 SHA-256: 529e0de47705a65a7d2b729a89cebf9cd601f3365903d49025538a753545cc8d
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be acting as a link farm to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://bean2beenefamilytree.com/clients/60578/File/44430661428.pdf
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/44303671342.pdf
    • https://nanosoft.mn/images/content/File/80706281967.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/1984d5565c81f9bf056281f0560f6047/galetemosexo.pdf
    • http://emirates-offshore.com/uploads/image/file/90103626820.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160967712510cf---95915566946.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/af3897306914da9e1c3ca38d3b2b2e1d/gewonatoxofenajufafili.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/acf0929fcc1d6247627698781371a4e4/85153856640.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/4ebj7jfj7b7e6br9eth7ukgmr7/simuxejanewemimi.pdf
    • http://nguyenthaotech.com/upload/files/bajoju.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/jl5cmggob23rudkno14qu7r775/pebomumamapo.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cjc7mfcelhj36ceckne9mtgjv1/sosig.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160918bc70a3b8---xufatogukuxixamu.pdf
    • http://luingpyrex.cz/foto/Image/file/fejetafaxikogabox.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9faedd8688---baragufapavujusudita.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/68b989f843e0c3499568586eca405dd3/29060990653.pdf
    • http://longthinhphat.net/uploads/files/86209260657.pdf
    • http://kientrucnhacuagio.com/upload/files/15224079877.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a8b3d9f7e---16870626282.pdf
    • https://dm288.rs/slicice/file/komozuxejop.pdf
    • http://jgbt.us/pds/userfiles/files/vebaxotimopekiw.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ed63b0f38---pusofesuguvemisukolewu.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/78233514617.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=girl+on+fire+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000bde9.bin
250627237f51d0467fb391ab4abf8f0356e0251a7f1cbc0eb04f5fa9f0ed3714
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBDE9 19080 bytes
font_01_sfnt_off0000dc62.bin
25f4ce8479e1f5d21ab1af1c272657955b6b36e31b0bc9557cadf55f8ddf1e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 10300 bytes
font_02_sfnt_off0000f379.bin
5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 1732 bytes
font_03_sfnt_off0000fba9.bin
79a0b40e72ff7a3b07ca3c6d7645bdd875ea91a97f9f4e66b079498cb6a772ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 18260 bytes
font_04_sfnt_off00012b1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1B 16792 bytes