Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfed11b9d0d6026…

MALICIOUS

PDF

149.6 KB Created: 2021-09-06 02:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 57592bc625f18fcfad39254f79775e21 SHA-1: d35de5734523242bb1f90ea012c651783c7bdd5c SHA-256: acfed11b9d0d602635b053b9a1aaa833b2d060d690cf8e716e131ad298a30890
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 as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous URLs, many hosted on compromised or disposable domains, suggesting an attempt to distribute malicious content or phish for information. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://droprint.my/home/ququ4923/public_html/userfiles/file/39279080416.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/30f0ef187bfec2114c5816bb3c8f921a/76908067026.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626758157.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/83329948739.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210822_487689761D00CDB4.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161168c4ad5e37---jowamaworuwuriturudeduvig.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca90d9d9cb---897127569.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729dc561512---93365059302.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3463bd65c27a6894be682d0d58dc084/76741334755.pdfIn PDF document text
    • http://dges.in/userfiles/file/lukukivuduneludufebuvazod.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/hltl81i0jp2b5a25adc10lgfec/tikuwetimonaxibiwiviji.pdfIn PDF document text
    • https://hearing-outlet.com/uploads//files/202108031113178806.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/dufuvulumusolutawusun.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/xixavojamoxobegire.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/aad9ad4633e39c4f7f0cd2dfa90b1534/xesijufaze.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c4dd5dc921---viveva.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/29d1dce6820764ec812a346ddf45f80e/vebubuza.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160ec96f6daeb6---nujajuxofabusosusamelul.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/82598965172.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610f1aac02dd0---doxexinedo.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/uvosusedaxilopelaxowubom.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/654bd18028858e2de15aeef57033616e/11622654438.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeef16371c---nazumisowovolatut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=istqb+foundation+level+2018+book+pdfPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC63 11388 bytes
SHA-256: 94c5144a78cd24efe9f91d5142287a848ce19410b068f574f38877092b2fb4d3
font_01_sfnt_off0001f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F701 21884 bytes
SHA-256: 65665541972499ab44a2607c248b4f9036ecd5c999f692165ae33cc74f470eb3
font_02_sfnt_off00022fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22FA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.