Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b9749e25d2a9a6…

MALICIOUS

PDF

78.3 KB Created: 2021-06-30 23:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 41108728f64455667bbd01fcc0cfc2f2 SHA-1: f599a92b0cb214a91c0941ba700e72c9a42fd6b1 SHA-256: 14b9749e25d2a9a6c0d65c31b56163fa9e127a7de12b4b41737f165c963506df
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URIs pointing to compromised websites. These links are likely used to redirect users to phishing pages or download further malicious content, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://crysiq.ru/uplcv?utm_term=basic+auto+electrical+wiring+pdf PDF link annotation
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/72843806271.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/kebopitev.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/pavojovajuvirororax.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/lotawagawa.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca2c5767db---xavujivopoxa.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0fb2029bed5668bd096c92e113797c3f/94447185442.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/f9d42ce3f46c8257ed3f3999d2708a3d/gazawazamezuwiri.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c676402474---xobewuxulolezuk.pdfIn PDF document text
    • https://robertbah.si/files/file/kopemuvizogunos.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b01a840cc51---22799087702.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608108392a5cc---73694020221.pdfIn PDF document text
    • http://debden.org/userfiles/file/sunujasarasavipefiro.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8708e1f88---vupabojonarebemajamaweni.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/92976081167.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/gagum.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072c796b68bc---86177376476.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/xerosedasilawoxuxofape.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/zimotabekel.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/gelofos.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/1cba9079bf3e174c8d49b8177fe07e8a/sixus.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/13645236058.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/0a81aef215285bf02aa10a849c504d08/7721589776.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/dofufigiwogejerevosimun.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/wiludojakotik.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_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 11032 bytes
SHA-256: fdaabbb91be412b859544f2092ea78d7a501dd4935ea1880cee875cb6626723e
font_01_sfnt_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 16952 bytes
SHA-256: a809c43a59594af6a90ee6c4fe878a95a951c33a384217f542b0848b4022c916
font_02_sfnt_off00011231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1