Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc262c6606adcf76…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 07:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 229f6d490bfd72a4dcbf4b556d3ebf4b SHA-1: 638c22ad1ae82f6be63e9ac46a9282bfef78a83b SHA-256: fc262c6606adcf769094b5209857e0b23f453fdf0dbb05a3d9bd6c98109d1eb0
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 heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the link farm strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://pistant.ru/uplcv?utm_term=the+ultimate+energizer+guide+reviews PDF link annotation
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6e671baf24a2c72c4ed980d42b211fae/livusofonumixuxe.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608303e2ab5c0---dilikajeneki.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608164196ac2b---25685681998.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ae424a1da9ebcc08aad74f4e9723ae3d/91066859438.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c5e1d96c94d8fa7e7ec2ae284b0a6f24/jewajurafozozudisuk.pdfIn PDF document text
    • https://computerzone.pk/file/mozudixiratojukaburat.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/35865614582.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079337b057ae---wuzuponomuwefuduzavomaduj.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b363d685044f43da9b9575df3a23b24d/wigawujovupikezesokepide.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609096d63ab51---45722704028.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/fijedugutojetofapolepe.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/32459401472.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d7ed8e710e8f32448eccf4395efa659d/tukulukilolatifixapoxemag.pdfIn PDF document text
    • http://myredm.ru/uploads/file/83182676620.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/7194o0dk8idcg53tdpmbo587r1/xofejerifeverexolexi.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac76bb619e---xikunotomowe.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/kidebebetuzizuzefojuroris.pdfIn PDF document text
    • http://www.asslar.de/downloads/rojotorevonekuviv.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/7o816heelruold9bde87521133/35962082895.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/37481191767.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9baee4665---povilisubomilado.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_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 17500 bytes
SHA-256: b97a84794489a73b171a981e145fa0f5590ce3c1261c29f182ed68e82a79e4ab
font_01_sfnt_off000116a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 10848 bytes
SHA-256: 82df2d8e6171976d87aed4621394869f7fa2ef137e580559bfb095a451e01891

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