Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6addc5ff3327570…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 01:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1aa07b6cbdda0325488aae6b3ae9369d SHA-1: 6c2d482ef1fd1a0eb165dc7ce8011c433203aca2 SHA-256: e6addc5ff3327570c6ef032b9b02a00cab18d044597e4d28a01847e9cf7e7bac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress upload directories or disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of external URIs and the nature of the link farm indicate a likely initial access vector via spearphishing attachment, leading to exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://learnazia.com/fck/imagesfile/pesijazezarogakutemoxabe.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098260ae06e8---70785678333.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/cbc9ddc671626862043345bacb8a7844/gobivi.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/7bfdc196cab538626929405acd0c11c7/99294057802.pdf
    • https://menu2uplus.com/images/file/sejidilotorojapufiz.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/53ed83548ef4305da78f82ce668c79ed/zujibifatuxavujimidul.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/pj0mu3t4f00ou1dlh781cegvg1/zuvibarokularanutom.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0il49b8vo804h0m1qtank3du64/77001827646.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05c09afacd---88399750145.pdf
    • http://okmarin.ru/userfiles/file/tuwozir.pdf
    • https://workinhotel.com/upload/fckfile/teposijojuguson.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a286b5a075e---genazizugudipezox.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607392a6eda84---51412520086.pdf
    • http://amuseonline.com/absite/userfiles/file/47566893927.pdf
    • http://svatba-emi.com/uploads/pages/files/tisemeraxalevagoluwe.pdf
    • http://sarljarry.fr/userfiles/file/wevodowagoxeduniv.pdf
    • http://canxetaianhduc.com/images/file/wurekufopo.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160755ffa5248f---tokam.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tf5k2rnask5ul7mk6ft7h8pbh1/gazodijujorajitom.pdf
    • http://jkohut.pl/file/noxajurokutopenigir.pdf
    • http://a-kamen.com/userfiles/file/zijoginegewefemuva.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/lkt3hndqjbdbbud8sh5o12lvjq/vubaroserusup.pdf
    • http://vattucongtrinh.com/userfiles/file/61053120633.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6546e12e4---verevaguzuwoseraj.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cf50c9c1779e22f829d7fe54b3cc55e5/63974196607.pdf
    • https://chp-travel.ir/data/file/vikekegutetuxuzutejeti.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+print+2+pdf+files+double+sided
    • 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_off0000ebc7.bin
dc6f3d7d62fa051d6e17a0c7e81bf5926d40e4bf79c02ee66c87095d7ea6c312
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 10768 bytes
font_01_sfnt_off00010484.bin
8beb6f8e5fb401fac2f55eb5dd7967a8735f1a949baad96e59d5e97ce34b2f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 17772 bytes
font_02_sfnt_off000133a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A8 16792 bytes