Malicious PDF — malware analysis report

Static analysis result for SHA-256 077ce03451788afe…

MALICIOUS

PDF

89.7 KB Created: 2021-07-25 19:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1812b517fbd29f84960b134cd45c20ee SHA-1: 5e0bc5c913ded4682189f89432b44e63f70e77fb SHA-256: 077ce03451788afef6cc7916016400fe1b6a330be217ca96cb31228bb84a0fc4
156 Risk Score

Malware Insights

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

This PDF file was identified as a phishing trojan by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary attack pattern involves luring users to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://savvyais.com/userfiles/file/34446415031.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d328b5c0c50---56623714110.pdf
    • https://ncsccalgary.com/userfiles/files/2426240363.pdf
    • http://mikailang.net/userfiles/file/20210715150308_1021554822.pdf
    • http://falerisztika.hu/tmp/95220533490.pdf
    • http://dambi.pl/userfiles/file/22216437603.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/r5rs2ur27elbl6d22pfqk2h5nmu9tmp6/22676612948.pdf
    • http://zs-oilfieldequip.ru/d/files/lesuzaluragagovomezinorot.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a1292d6215f5a1f421368b951a156b6f/85207753502.pdf
    • http://accessiblevehicleservices.com/userfiles/file/42976270512.pdf
    • http://kunbot.com/upload/files/65001913069.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b789db596d---bepewuzajojepazul.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c17f58958---fenozuwitomexixav.pdf
    • http://grhs1983.com/clients/72571/File/visigori.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fc4b80d854c---luxasavovesurogedavu.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0029b8029---movikokumunegisasizik.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bb598f0f897---kikazi.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f50d1f075---subakar.pdf
    • http://elhammagazine.com/ckfinder/userfiles/files/ganimimunuga.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/65431fd91d3de8ecbe7ba026103bba41/vadavamafisokolofati.pdf
    • http://h-st.nl/bestanden/files/94062316788.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088f0ef174d2---81116976563.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c3874b3f20f---tebew.pdf
    • http://studiogiamberardino.it/userfiles/files/32188995153.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3de9e8830---dubavopi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=series+y+novelas+turcas+en+espa%C3%B1ol+completas
    • 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_off0000f6b5.bin
cf51313b54f415859622239e9b5768e9aed2fa4bcd4bfb3dc268d01323452a2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 11096 bytes
font_01_sfnt_off0001105e.bin
f81a69e86fe1ae3c5bde9dc5f8407716532b9f8c35f2d569a179dabb5d152b78
pdf-font-stream PDF embedded font (sfnt) at offset 0x1105E 19188 bytes
font_02_sfnt_off00013f08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F08 16792 bytes