Malicious PDF — malware analysis report

Static analysis result for SHA-256 27192c2fc12a851b…

MALICIOUS

PDF

76.6 KB Created: 2021-09-25 18:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 82d8f6142f341df516d645411fa0cffb SHA-1: a816da8f4a53edc4074a46f1114c2d8dcfced285 SHA-256: 27192c2fc12a851b55a65808c1316897a42060dd4e7d65b11a74173e6abfe47c
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is structured as a link farm, likely to manipulate search engine results or redirect users to malicious content. The 'SE_QR_LURE' heuristic suggests it may also instruct users to scan a QR code, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=how+to+edit+cinematic+video+on+android PDF link annotation
    • https://ajwatravel.com/wheelmarine/userfiles/file/94069463946.pdfIn PDF document text
    • http://dobermanncz.eu/files/lutefolagi.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/12717355141.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///74023778289.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/86260823291.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-24/20210924120518277418.pdfIn PDF document text
    • http://www.bandungmesin.com/file/jilijarinetegadeposibo.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/xutozad.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/8ffql8jsn4qfv8cgesrvklup4n/7389405541.pdfIn PDF document text
    • http://skrn.cz/pic/file/pisexof.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/60213484665.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/kumudenaz.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/jumulagavixatuxor.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ac4c918126c977cbadfe4fb4d4ee07af/mutilevurip.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/lunaxizage.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/brjq4bpmdurf628l01o7qvtflc/80354759898.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ncdmvh6ocfrqg7s7m540300el1/53927517016.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148cc9e88d44---12780752473.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/xupowapeki.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/67527653450.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/dulexamaxodatok.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/81303170761363329d9b99.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/teluwis.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/7967482146.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 18776 bytes
SHA-256: c70c6ce8be7dfcdfa87f1c17d70ca8937958edd2fe3829417bd7040010bf82f1
font_02_sfnt_off00010ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CED 10460 bytes
SHA-256: 8cbb1293fdc32b4c974b978d6796ba502dbcf34c9834974b01b09207b4e7266a

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