Malicious PDF — malware analysis report

Static analysis result for SHA-256 90266059eb9d3cf2…

MALICIOUS

PDF

86.9 KB Created: 2021-07-04 22:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f28b88d350524be30ae5c289ca6f9e9a SHA-1: 8ddcb229d06f011ed8268111376f0398004f3a4f SHA-256: 90266059eb9d3cf22cab010777aafaba3de79fee9542012eaaf9c17aa67693c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a link farm pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of multiple external URIs and link farm heuristics indicates a deliberate effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://pistant.ru/uplcv?utm_term=adobe+photoshop+cs6+with+crack+free+download
    • http://bhttourist.com/upload/fckimagesfile/81542551119.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d7d4e7f9---33083338023.pdf
    • http://astorandblack.net/emailer/userfiles/file/51329287102.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085af17bd50b---larivonisabejikapojima.pdf
    • http://ateliergermain.net/sites/default/files/file/15372844639.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad5c6d4ca---nofezoboreku.pdf
    • http://blueview.nl/app/webroot/files/userfiles/files/kunixavitajasiwegep.pdf
    • https://hgb.se/filer/file/sovezi.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/87161eec4490058e77bac20810b00d11/41642795263.pdf
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210702223452.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd80a6bbb---noxutow.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/givegukagawo.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/ludaton.pdf
    • http://effektfilm.de/files/file/nakotekek.pdf
    • http://meble-tk.pl/userfiles/file/18829325042.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c7329eef5---59764773345.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c748338fb8d---95571513571.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/1ff48ac439ea0dfe386d2f5096465bba/60344154645.pdf
    • http://kulturazebrak.cz/userfiles/97140128674.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b93a9b5b163---ronofosunejov.pdf
    • http://apsons.eu/files/file/29025446682.pdf
    • https://vegan-eshop.cz/data/file/godubunukovegira.pdf
    • http://arnold-sitter.com/CKEdit/upload/files/keteleliniwepe.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d9b0fc5d3e666edb3a4829563453f6c1/ruxanugozew.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/695655aad51ffb3ad9bd838cf0329398/siwivagetepivugobaziba.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87acbd9aff---vizotulafu.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_off0000f072.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 16792 bytes
font_01_sfnt_off00010884.bin
245ba8e46e0b5a71c44ff852b3e8e8483836aba067d4fbe19bff879d4d0bdbeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 16684 bytes
font_02_sfnt_off000133ca.bin
880e711693e7e7449cfc64d938b1615a76c3bef0b54c6dff78b9efe2b9584e36
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CA 11184 bytes