Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5d91e5ae28ee30…

MALICIOUS

PDF

88.2 KB Created: 2021-09-03 16:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: de2a4f4820c12f0839bc5b647542379a SHA-1: 38d02504234ba272bda5247ac0c55011ade2db06 SHA-256: 1c5d91e5ae28ee30b7582b06809f0501820adc6e1ed551f6e5af74b99007b8f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://smidgel.ru/uplcv?utm_term=ayurvedic+garbh+sanskar+pdf PDF link annotation
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/c48pim8t5ojjofm6j24pbpebc5/sapuxojesidewizi.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094525c402ef---gutaxojirumogawo.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/rerukesisetovosow.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/delufurewalexubitejuze.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c910b0bd3---laxinixufajaxuruxilenug.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/lumajud.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d3100befd0770a6049360eecf7ebedd6/tijevi.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/nomiro.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/xufikininugozejukebewi.pdfIn PDF document text
    • http://norview63.com/clients/5/59/59ba6e1aa7224642a1eeb14435756cbf/File/kirelawezubekomovip.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/kijojaxamo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/120a8b2253c14f867c7c5841b4136f45/82474935696.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bc4cccdf8---dukagaxigojesozipix.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b932616dc95---38115627047.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/ragifawukadidina.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/9259029071.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rotfiuhe7ifol45ah65qnevut0/zuwojibodopovaz.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/relujuzirosidemi.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/sorob.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/difikovadepewipaxijelunu.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/e25a303909728a6afdafbdc91a992fb7/varaxipumitesunu.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba5de2ed9---64364644865.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/79509393645.pdfIn PDF document text
    • http://expresskaliski.info/file/nirisibade.pdfIn PDF document text
    • https://designclarf.it/file/furulabogutozo.pdfIn PDF document text
    • https://keongracun.org/contents//files/73214245568.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 18336 bytes
SHA-256: 9d3bad1bb8c8c572bc6a069ad720b8c9e781c1b504b2613ff4697e978c153180
font_02_sfnt_off00013943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13943 11128 bytes
SHA-256: 104764887c5237f741ea9a0a7f863eba5364b7d45ce1bea7339366e3250f76b6

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