Malicious PDF — malware analysis report

Static analysis result for SHA-256 642f6b3786eb303c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 17:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 05340ceaeaa980808cd02098dae30428 SHA-1: 3e9b56f5aefc8f5b313eb719783062799297f130 SHA-256: 642f6b3786eb303cd30a39565779ea564be21322deb179ca5a4238a540679060
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the overall structure and URL distribution strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=lowrance+elite+5+operation+manual PDF link annotation
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4f12c49ae---16576098062.pdfIn PDF document text
    • https://luminex.pl/upload/file/kefubumudometisimesalukuf.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a56ae7f5a---rufilebekabumofur.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/57279975631.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/gijofodimu.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/17935829538.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/2a2e2aabc293786b133c3fd40007c7ea/60484136554.pdfIn PDF document text
    • https://manenshop.com/upload/files/fudebetixe.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/66857375413.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fq86vk5mad96c3qm3jptatijt6/56992302670.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d73dfa991f8---1045902732.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/xerapuwobowamafugigenepij.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/36606748238.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/33981052854.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dce10471825---lasiduvizurigawulupidijox.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/for171c54o1qtkkde8qtdi056cufnfmf/nonozipoxinabibovumuk.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161237d5f1092e---zoweke.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/badose.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/pemivogix.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160859e802fb35---88401270938.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/21690647791.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c466193a993---lulipurumepe.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_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 17940 bytes
SHA-256: e4e697c97302574284da2da1963b50df011be6c770d32f93e6ed2436dd000419
font_01_sfnt_off00010946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215D 10644 bytes
SHA-256: 29cc36b005a29e3df4524828b8858bdf50c632f9f7968c46a2d6fc58013fb9c9

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