Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a6c6ed269457ca…

MALICIOUS

PDF

74.0 KB Created: 2021-08-07 05:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 566120a8c99fc4cf4732b5a602b58448 SHA-1: 530d3e68bb5fc54f902c424522cb4e313e3b1011 SHA-256: d0a6c6ed269457cab4115b895ffa798b4d97f3b85ceb850d5e189dc70edce33b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://pnlcoach.com/misc2/file/ In PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8a294a322a6d8c2ddbf810fd48e0e9dc/xudubugit.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853c0c6a925---viwogegamegabenijepunex.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8a31687d41ef384f05b5e0ddff32edfc/punugutu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/1j6sri5e0gt194fb7e5f2ikufm/fijumilixegebulefiwim.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d35ed6f763365d2b7e6aa741e91c38ac/wapadofak.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/94079010530.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9a962f825ae815ff70c4a8169f95e130/99176326498.pdfIn PDF document text
    • https://dm288.rs/slicice/file/7527947449.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/50716016800.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d35ae3e683---xojube.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/71827994736.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/waxubanepuferatete.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f958b0b72---vafugikoxamili.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7b168e8f---tamexokam.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/sikenujozifufizoripadur.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/witumijezeg.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/84348691865.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dec7a74c890---gulixerawavudezidu.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/ziditib.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f150d728---7619618104.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/2179021730.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/lavijizapufevo.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c441c39955f---kupufewibotedosuzaku.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/tevimonagalopidapali.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/dikawudedidajabexagobiwe.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ce115f2c---xasegusegewumokedesodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=bedava+ilahi+indirme+sitesiPDF link annotation
    • 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_off0000bf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF54 17148 bytes
SHA-256: 597e6540fe462be897aa14437e898347b6c3cc3e535eda7ddd90cfa32fc412a6
font_01_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 10512 bytes
SHA-256: b4b87549ed5bd8ede1dc1d426f62f17c201ded0635a354032932045c0c3f1d52