Malicious PDF — malware analysis report

Static analysis result for SHA-256 24181302ed19521d…

MALICIOUS

PDF

78.6 KB Created: 2021-08-29 15:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c30f7bcd4c2d9f391619cfeeb3f35e7b SHA-1: 92fda32aeeebc8a5be77ee1d5d92a75eca5a455e SHA-256: 24181302ed19521d6824dd376864c330fdeb8c1e24f10e75c2dfff280bca2691
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of multiple links to compromised CMS upload storage and disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://oniceh.ru/uplcv?utm_term=examples+of+self+responsibility PDF link annotation
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49371d1ec3---91692498593.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/32517994542.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e0f6475418e9aeb5d3a6b51a9346f862/gomazekirojimajases.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/zadebomujujozezeli.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/74011696567.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/1685534147.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/dusenagazekudejumesediz.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/930068d3613a5474df5f07ffeb20c6a5/fevomitakojaxopamaki.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/vagej.pdfIn PDF document text
    • http://willbramephotography.com/vafanunubokamibuxinagav.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/75676732331.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/lelexakegokizodobuguj.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdff2668f7d---xagilalajepodiwataxi.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/dezomile.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/donujorimowajija.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d62b80e5c---kabubozi.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/bewosadakaguvak.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/29568140794.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/65871046526.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rexewirewesuroti.pdfIn PDF document text
    • http://esangsok.com/upfile/files/duxajiwosizoba.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/2jrdgcua59k4mccrfpjk6vo388/wiwajivenebojisupo.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/rusivesujit.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD054 10860 bytes
SHA-256: 0b011b32ce101751b97ff3a58f80c896ddf9566f03735e087b905a26ff5d5c73
font_01_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 16848 bytes
SHA-256: f5ce0863c9c2b63a39bd3415cbb05c8d2e18c553d602e75786ea01628cc889a7

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