Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e782aac1cbf1c5…

MALICIOUS

PDF

185.8 KB Created: 2021-07-13 20:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e05fc159073147884fe6ea18b22be0e SHA-1: 519c990ebf51d00d2449d3c0502142c0d48b2581 SHA-256: e7e782aac1cbf1c5ee0f328dda2e773273c5fb4a8edf0b71ed04b8b5631e08a2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://krisoc.ru/uplcv?utm_term=rescue+battery+hens+near+me
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/74a82787f2560f6af4bf2cd3e9aee356/buxemepulalaz.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/lizimibiv.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59c4e9076b---4513647082.pdf
    • http://scbczy.cn/up_files/file/20210619_221520.pdf
    • https://mobilieroccasion.fr/uploads/file/ditojuragula.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/69e50ef73cbdcdfaf48d0298f34f1f5d/gunojapopatanefa.pdf
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/menilobalidimivapega.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/631fc595be876689b14ae35a35cfc54f/77316778668.pdf
    • https://cheesykeju.com/contents//files/finunirugavaxaludunewuda.pdf
    • http://suachuaspa.com/upload/images-content/files/dewalev.pdf
    • http://eyupsifalibitkiler.com/resimler/files/1853481141.pdf
    • http://rauvuonsach.com/images/uploads/files/8526221858.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/50ebe55593733abbdffe52fd99019748/ropijiburigiza.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/kokugifijopiki.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f5e486406815d6891f9152b4f841ce86/juramu.pdf
    • http://papaicountrylodge-longstay.com/user_img/files/41721624233.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/dqk3jf45c2m48gs5dlli5obgg3/428557525.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16090387783c7e---sevavazibope.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17a07511a---kudenefisuxebeninure.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/4bdc3cc2d322e2cf34a4e93ca64d05af/61017887862.pdf
    • http://cn-junsheng.com/upload/file///20217120533830.pdf
    • 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_off00027731.bin
51f81410befa7b1cd263cb1399c032107129847840494e0463bc11f1c9ee5b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x27731 10636 bytes
font_01_sfnt_off00028f69.bin
77560c186e6949034930cb7f9eaa4eb56e55560bcf0569b9eba1ccbf97dfcae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x28F69 18908 bytes
font_02_sfnt_off0002c138.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C138 16792 bytes