Malicious PDF — malware analysis report

Static analysis result for SHA-256 0652496ebc6ce38e…

MALICIOUS

PDF

90.7 KB Created: 2021-07-21 07:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7e4f4c2f2dd5ef0ccbec72eb340cb50 SHA-1: f7f97b34f3d881227d19664c6b287e433a9fb92b SHA-256: 0652496ebc6ce38ecd87a1cc3537d20f42752356350dd3a10ade2de8dab38c8e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of multiple suspicious URLs points to a content-driven attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://traicaygiasi.com/Images_upload/files/jepapilifufif.pdf
    • http://portalcom-b2b.es/img/user///file/_0475875001620801405.pdf
    • http://www.celso.org/download/6294712861.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tp65o3la06qpe4qngtpdkrin56/lewos.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8c7a9a6cb863949122b956686387b74d/9631890568.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/d01b216aeb425e565f9deb304296df38/3050685393.pdf
    • http://cellesekorea.com/ckupload/files/xugogorilerog.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b92b12622bb4ac3942376eb3603111eb/boxejojomokefuj.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/c521a83d76a4ffa836b1af7042fdaaa2/bopokagazudox.pdf
    • https://fceresources.com/ckfinder/userfiles/files/bofekifitibadilojilige.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/03597040460ea46e636d38b1d2e4c9f3/kitagafe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088457f6d72a---xufuw.pdf
    • http://patp1ryb.ru/media/file/52718040250.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/b0256e2580346757c13a851965493061/30386023184.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/595590396.pdf
    • https://gencshow.com/upload/ckfinder/files/70420604358.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d71a959fa---45072110779.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/05fe54bd56bb9d5e3c0915dea8c72d0f/xetazenalufuf.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3da02b795---jemunuf.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090913655c59---rijedarisepi.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6t8u2fi22iehmumeju45vvuap1/kexuwokuzixesobi.pdf
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/34261584678.pdf
    • http://dok-vo.ru/userfiles/file/jojevakagugezivako.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+long+can+u+leave+uncooked+chicken+in+the+fridge
    • 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_off0000e967.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 16312 bytes
font_01_sfnt_off0000ff73.bin
89d6adb63122983e09b1646a58c71d9146b0ecc0e9121d01d69dd84015dbc9ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 10924 bytes
font_02_sfnt_off0001187f.bin
b01764b7332bdbf3e99f2ff230740f7eda5824e68e2ba3ea449570c11b5b5a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1187F 16932 bytes
font_03_sfnt_off000144bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144BD 16792 bytes

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