Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb1411d4a34ff7c…

MALICIOUS

PDF

83.3 KB Created: 2021-04-29 05:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a91f4693d20dae9dc911bb38284ec722 SHA-1: 072cf568afefed852addf9ad304e0d42911cb48b SHA-256: 2eb1411d4a34ff7c967178e42c0a979a69588662a8c764df52315e77501df037
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file, identified as malicious by ML classifiers and ClamAV, contains numerous links pointing to compromised WordPress sites. These links likely serve as a link farm to distribute further malicious content, potentially disguised as an "auto clicker" tool. The presence of external URIs and compromised CMS upload links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb8a653b8---dobozor.pdf In PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079532e881e3---potipojinixodemeb.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/8aecd12d0daf336986c2c1a5429ea388/22425932389.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e222cad8---54022526948.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad91e04d3---dalesaziferizu.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0bbc36b1c6f459fdf928260a829401cd/95658600410.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c02288b8b1---donojudisopekibixojaginud.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e368ab64f---45731630210.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/45ac5689af53aae9a4d25095bf255eab/40294472507.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078658593a2a---39820614884.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/b20df638d117e60f3eae3b80e24ec686/nezogakunebure.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089eab59126e---96039074460.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e219d05b5b2c751f4a7df1c231aefd97/dozofoneguji.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d479ac176087939288e5d79365f43eba/25350869194.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894282f02b1---xufivojobo.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac3e452fe---87710088156.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca14e9203d---luzekezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gs+auto+clickerPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 4760 bytes
SHA-256: ac044aea8c107da73212b0bf43812656273b9b9d3dde8f378e3e3927f13b910d
font_01_sfnt_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 4888 bytes
SHA-256: 5868caa687b9409253954e6297f8fb7546ee5fcc84622ad26f016433d5e97ca8
font_02_sfnt_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 17088 bytes
SHA-256: 32938939627fae1bd77a09759b20735c5b7bc66eebaa9446d9706f5503af9d58
font_03_sfnt_off00012844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12844 16368 bytes
SHA-256: bdd4aa74f0153285475b3df604b69aadf14c0c34484e8197928d4c9d46e518bf

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