Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fca68297b511be2…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 00:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ef13fc2dcc42687c6161d46b5eca6be8 SHA-1: 57b3edda9420c848974720eefe46886c92a02bb4 SHA-256: 6fca68297b511be234360ba845d10ab7dfcc18d12107dd1ccdc25506b2014b20
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or redirect to phishing sites. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://huntic.ru/uplcv?utm_term=what+is+a+great+aunt PDF link annotation
    • http://bakoca.hu/files/file/rinimajaponikitetisagat.pdfIn PDF document text
    • http://nikolabartakova.cz/files/file/12737183670.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/5662695899.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f33c84018---34744343480.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/wasiligokupixe.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611d90f68d0f0---bijudabaxawetif.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ae1d2ea7fda785f8abbe51342da13445/vapinovakez.pdfIn PDF document text
    • http://htwy.com/upload/file/79338732148.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161258d4af07ba---15542529634.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/750717ca167e6dc2089c9033b389cdf1/75597985741.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/8213263441.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/loxugawulewefubetite.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/sh93v1i5u3p6e8nov2eam938b7/muzegewidefusonidabadul.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0d57821d---bemokarobubedit.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/redejupiritezubam.pdfIn PDF document text
    • https://service-panev.com/userfiles/taviravit.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/45304953545.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/kukefemenugovakij.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b417570e7b6---pasal.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/dp7pcgjq81ndchlghjgnr6di55/43134191186.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kcggjklnt5i0s6mlu1hsnr3205/32636935982.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/82090590712.pdfIn PDF document text
    • https://soechi.com/userfiles/file/90236214988.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_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 18376 bytes
SHA-256: 023077cc742313f9b80fd1d36eaf6bd1c73b818e89c256e812c4dea13ddf0b6b
font_01_sfnt_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 10312 bytes
SHA-256: 59ac55e1db45eb2f56a9a4b4e721abe351027574eea2a91aeb84d501635bdde3

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