Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fd5fcc269e931e…

MALICIOUS

PDF

93.9 KB Created: 2021-06-29 05:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 951f0d064e83812eb2d1b9c5928ed0b2 SHA-1: 52601a14fc9a36a3dc4be44626ac776e31cc5455 SHA-256: d2fd5fcc269e931e86b80a67426c43255bf3107e7b4cd37824bcf5abc7af3049
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/88h75h1jjqbpb60h01aer70mjj/11835858478.pdf
    • http://cn-daomeng.com/upload/userfiles/files/795ce2901e531980cad441ebfe350a7a.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7b0d1c50366b210f196d0b2af1dd1ad6/tenodopevenipomewokadak.pdf
    • http://grandp.ru/userfiles/file/16956312278.pdf
    • http://asirakademi.com/resimler/files/ledokorimuwulogalikelel.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/0b6e9461f641a0e12cb28e908de8c44e/detebopen.pdf
    • http://stpatricksreunion.com/clients/84553/File/runuzifom.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/539c2ef2bf9a0551f1ddad760296c5a6/39973717705.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/a68e660d6e302dfa046e65c221190b7e/jewezaxenubomijopus.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52f350aceb---79670217400.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babdfc1fc4d---feguzudifigevobo.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e5cfe39b30a3021c6ac745fdaf2edbb9/12277903720.pdf
    • http://rustproofingottawa.com/userfiles/file/sirudifesoni.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca078c0ba5---vugedami.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ujtae44fd1t0c59d0invvi4vf4/64367758562.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/6fc653aac14c08aa8a5e6857065c82eb/fijigejixuwajiwa.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9a44fadac01dad617bd7ad2feae2bee2/gemalajamedobenimin.pdf
    • http://architettotoma.it/userfiles/files/49356030233.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcfc1468df---78080631125.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/c7667507188949a7121c24920a377786/77797223135.pdf
    • http://krevue.cz/UserFiles/File/44778142558.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160704f567b5bd---kafopavapokewolelutexo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/nnkgl03vip8as6lfuul9113qr4/toxojilidusepu.pdf
    • http://yonezawanet.jp/units/24250/zcycom/files/17683259675.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/4da380bea15e688fe7a61444f2031754/rezufovamazal.pdf
    • http://sushistoryus.com/uploads/files/dasodaxowosugixonawabew.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+much+does+a+clove+of+garlic+cost
    • 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_off00010ddb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 16792 bytes
font_01_sfnt_off000125f2.bin
b3f30be65111569ac5996d6fc580fb988ef9039821684e020eaa03a23e7c7ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F2 11064 bytes
font_02_sfnt_off00013f8c.bin
b1413eeb8ddc2347928898a46c7f7d07ad1c8d4e06c258996ffc7f76a757e56f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8C 16384 bytes