Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01b60cdcfa4e1f6…

MALICIOUS

PDF

87.6 KB Created: 2021-06-19 22:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ffb185318ddc4a182000f08aba88f601 SHA-1: 9a433602ee97772eede385640e01a18ca68bcb00 SHA-256: f01b60cdcfa4e1f619d8469c6c8805128ed6b56a51e983f93805c8d7bbff1758
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 multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://chcial.ru/uplcv?utm_term=gmd+immersive+mode PDF link annotation
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/600gaoauo8oa90an9f2b5vl1q3/nivogajazelizuwafojeno.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609edd860b0d8---lolilapiwasu.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609203e9cd41d---48863992388.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/rubuzani.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9rakfdp8lsbulg2fl84njb4job/lobizotomixu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb771347e30---40633769661.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/zakemegumorepila.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c62276a2207---gozunofinonavikaf.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/42669499166.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/36vi503l2n6nbmartm4cc603l3/warozopo.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f12908c317---maxalufumuvepupozavofi.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87876e8add---dusabegekedigil.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/e295931cd0909144c9cccdd83fb7b172/75832605713.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/54a9e8d8ddbeee65ec30f51fc0e957b1/61859445685.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/56602959944.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/rupitasofegifakilemojo.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/93354651441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001262e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1262E 18192 bytes
SHA-256: 11ebc7b2cc4222c034360bef380f581099626c925e7b39f93b0a5e841f042183
font_00_sfnt_off0000d505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD505 7884 bytes
SHA-256: 59bb0177939a142b9406e65f68567334ff41ca51aa4119abd9f34e49e18c6c79
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 4420 bytes
SHA-256: 2e2c872b3c1a375db5809517daaf659bb34057bddbba579a9eaf729d19399966
font_02_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 12336 bytes
SHA-256: f79b621ef0221258365f41f0fb562b730c4b5530e28f90ae80a67d5b6016d8b6
font_04_sfnt_off0001427a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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