Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca95073c2b6049d…

MALICIOUS

PDF

89.7 KB Created: 2021-07-16 19:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe2e63d60064843ceff31864904ebe19 SHA-1: 106089a224767ca8bd65a62e243bbd654dd46797 SHA-256: 5ca95073c2b6049d282695d1334a474f74a587e9ad75a7bed80b5a269d80e9b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites and other domains, likely intended to lure users to malicious content. The presence of multiple 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7822dfac5---14070388023.pdf
    • https://chp-travel.ir/data/file/sabiwozimogurobuzixujur.pdf
    • http://kingtonkatsu.com/uploads/files/30593598047.pdf
    • http://saothienemb.com/uploads/images/files/mumulukem.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099eae3cfa4f---64776274070.pdf
    • http://fsgpj.com/upfolder/e/files/20210702155657.pdf
    • http://innova-perila.ru/upload/files/xuvenowutosuwager.pdf
    • http://baovevietnam-vnss.com/upload/file/48536058192.pdf
    • http://nakajima-ya.com/upload/save_image/files/gunekamivivoladakosop.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c983bae0b7d---kitafikogaxugafowu.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be1bde6dd9f---suxezededeto.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608467cbbab46---50733631648.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/70440a68493eadca8d415e25ceca818c/japaripoduzuduxamurox.pdf
    • http://ibshop.gr/uploads/_uploads/files/xijatelarojipevabejexotaw.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/09d3c68bcc20b1e0bea6541c7edc2250/78739677968.pdf
    • http://christopherdallo.com/file/7800289646.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/cbea66b0b8fa04044888ed63bf199ffa/migikerexasoxog.pdf
    • https://michelbarbot.com/upload/files/girafutuxefujapi.pdf
    • http://www.biotanika.pl/upload/file/88450921030.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b8b3edc63---23428691306.pdf
    • http://ipublicity.cz/data/file/jetolivejowadubupurap.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2434c599c---zalopiju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=what+is+the+climate+in+eastern+europe
    • 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_off0000f37c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 16792 bytes
font_01_sfnt_off00010b8e.bin
a01163d542cbe3b7b816f09fc9884e7a36b9038553f9bada75d957d5651b2bf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8E 21172 bytes
font_02_sfnt_off0001413b.bin
ca7efd3967aab160dbe34ef9dfe44a6c7a76df6aeda6a31c40b06abeb5fe1d44
pdf-font-stream PDF embedded font (sfnt) at offset 0x1413B 10732 bytes