Malicious PDF — malware analysis report

Static analysis result for SHA-256 979836b3b02527e6…

MALICIOUS

PDF

87.8 KB Created: 2021-09-24 00:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b43d3160bdd80fa64f6186c9178003c3 SHA-1: 89e500c4a3d827bfca3b36d2af7e2ec1a5c154fe SHA-256: 979836b3b02527e61a64042158a1544730681c3997a8940db15b238f10a12101
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://catamma.ru/uplcv?utm_term=how+to+get+to+setup+wizard+on+android PDF link annotation
    • https://mjrspot.com/fckimages/file/nabojaz.pdfIn PDF document text
    • http://telecycling.org/files/file/litinazixekan.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/samopokolikejudelum.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/kusema.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a167a4b2fb---92535966507.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/juxezipifituwitizodibo.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/66549270311.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/51934394320.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/sixotizafinukixakifes.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/aa9074f53882861ae71b5f60cdc4a861/pimefuganubi.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/vemisarewakodutoni.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/jetepojatojuto.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/tuvaz.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/xibijafefukekukurazu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/012418924ba463106682d0d8b98a0bc2/sipurolu.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/28931482877.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/kimen.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/patewegila.pdfIn PDF document text
    • http://fxmeat.com/upload/file/2c5756b7d85e3d562111a4ac67d726fa.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/jazovenow.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/lorog.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/3467065700.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/26076287284.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/74965328916.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_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 10756 bytes
SHA-256: 6dc8b1f8acb46e964bdf8fc815c7f7318264d64b6d6d8676d9eb773b3837c094
font_01_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 19384 bytes
SHA-256: 85d9bc343f26332a2fb5bbba73e99ba70b409a819aea30c3da13b1314af22483
font_02_sfnt_off00013939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.