Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ba565335a3028…

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 15:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0acc3b26112435b5d5cbc089989f9ec SHA-1: d7f05fc014d090ff8133e1fee84aaff017dff074 SHA-256: 626ba565335a3028d7a879ad8e634e65073e2bc731049f08e7c94dfe88dd1418
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised websites and disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da043800e4---26607102535.pdf
    • http://uitvaartverzorgingsindex.nl/images/uploads/69598912352.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/o70ccsjs22h92mufv35l5ainpr/zipadonatilemobaxok.pdf
    • https://dbjadow.pl/attachments/file/67982125956.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/705c9d7799d154c086d0aaf9e55ab44d/86390750510.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/9177864766.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160755ffb89e68---pewupakejofu.pdf
    • http://guojingmall.com/userfiles/file///56155902294.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074ae082780c---xujokazawixu.pdf
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/50272112944.pdf
    • http://bukharajohnscreek.com/sites/default/files/file/ragiwimuf.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/500ba47f9e5118713ea0981ab0a41f15/kixul.pdf
    • http://timavoshipsupply.it/userfiles/file/61721910138.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f769733cee---verajojojakesuki.pdf
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/9065406689.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/13170671559.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f1bbe463a8a231af9ebeebdcf80089b7/28067806542.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/fd805acaf427bdc1ccd20956c46c4ace/61657610121.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c2d36a30d---33831038922.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e4961af3513ab827705622c3c095b8e7/21904983420.pdf
    • https://canionglobal.com/FCKeditor/file/xovetaxafe.pdf
    • http://ankaser.com/userfiles/file/79835586468.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e30fb573095ad5abfa98c2eef092a7e/37196110961.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=classification+of+matter+worksheet+with+answers
    • 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_off0000fa64.bin
5f4365e4dd4badf09c57641a4ea068d47d89df6d1aa9b2118e4b252cd63a0f24
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 16620 bytes
font_01_sfnt_off00012548.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12548 16792 bytes
font_02_sfnt_off00013d5f.bin
50aa9d81ee6c9c47f00c61098486fcec652a1b1d44abd348b3261b6baa2394e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 10812 bytes