Malicious PDF — malware analysis report

Static analysis result for SHA-256 d211ff7cc10d8dc0…

MALICIOUS

PDF

86.1 KB Created: 2021-07-05 16:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5e0c53e33bc60007936ca23d25e108c SHA-1: 6eef5cf41fcea70ae8e22a56d2c55e40ad295e5d SHA-256: d211ff7cc10d8dc0e01986345b4f53aa24b07447ce2de954a8493c1926bde2ac
156 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 functions as a link farm, directing users to multiple potentially compromised WordPress upload directories and disposable hosting sites. The embedded URLs suggest an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854dc553081---18154168650.pdf
    • http://wawa757.com/uploads/files/77967831607.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/196fb22f2ac52ae1898d3fde0d0a0c98/24462064070.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/gunupit.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090572ede487---vovabut.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/6l52tu2p6vbmfblmjnleiinnkp/najarex.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/79c6dd4cecc7ab85f1cd3f2b8322c43e/92126467462.pdf
    • http://myucmas.com/userfiles/file/38858554977.pdf
    • http://fedoro.ru/upload/file/32870308106.pdf
    • https://jajugroup.com/ckfinder/userfiles/files/dilad.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160967cb97a078---8160001857.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/82250276929.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607823556f694---vapepal.pdf
    • https://aquafilling.com/userfiles/file/26732761126.pdf
    • http://amexeuro.com/an3_Uploads/file/mimovozawilaw.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7baba258fdf6f8086405128e102b644e/ginimuvugeduxuvifubir.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/68699876a6df605ba4a48f746b079f04/lituwefoxifanatiwo.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/851eh6noouvhdf8rj09oko7s61/gupinazuguxopopa.pdf
    • http://dambi.pl/userfiles/file/7787923054.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2ff29360---16725050072.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087c666e6ab1---xagitega.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826e2df0bea---fovinaxe.pdf
    • http://unseenadventure.com/userfiles/file/bixojizusogipata.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=watery+blurry+eyes+in+morning
    • 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_off0000ee80.bin
92122c3c833b4dbb2f6435620b275c0cf4bb50cfd9003b267157450a27ad8e8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 16804 bytes
font_01_sfnt_off00011a43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A43 16792 bytes
font_02_sfnt_off0001325a.bin
afb1d5bc429e9ccf03b1961ad67bdab151ce554fa0cc5b420e6bbd049cd68218
pdf-font-stream PDF embedded font (sfnt) at offset 0x1325A 10796 bytes