Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d626cfc55363e67…

MALICIOUS

PDF

121.1 KB Created: 2021-09-01 01:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 06928e692ae1aa58e910114fe3ea35e3 SHA-1: cde3ce299f5462ce77a33001f4a060289da19fcd SHA-256: 1d626cfc55363e67ec631069825591de66c65ad99a270d515909570ae29685ab
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://smidgel.ru/uplcv?utm_term=best+site+for+mame+roms PDF link annotation
    • http://himalayakebab.com/shipinc/userfiles/files/kefososi.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/261g57fap8l7pl9up78g0cm9ev/62550961710.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/88333381465.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/83623652420.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/8a2f5773f6bb68c9716a94ae908bbc7e/zotavopikaduwufokulizapi.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/d3e414bbc1c183d37dc6731e8537dc3b/79090222565.pdfIn PDF document text
    • http://sport-way.ru/img/file/10862879454.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/l7t9a3ertn4ncd81op5ti7n6a1/wuxawatevalixofobotuxozaw.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d220e56f63f---63910661543.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/kifinegutusil.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/85464894159.pdfIn PDF document text
    • http://teifsepahan.com/files/file/lakadavolaxozusi.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/juzopofikonexizokoxijo.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f31f02b88d---betalawenexedadulesi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7de5d8fd2a3ba959c3fcd5c079721c2e/lubasobexejimile.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2e18bac95---89582477934.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160836ff73d78e---rolaguwuw.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbe89ec183---46229598272.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/silow.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/36209303084.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/bizuminiz.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_off0001776a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1776A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F81 10280 bytes
SHA-256: 6ec844d5bf2f321f74a103c6d34bd03a84f6626dbcd62caa83133aaa1dc5e440
font_02_sfnt_off0001a6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BA 18200 bytes
SHA-256: 4aa2f2888aa960bb26a684b5b75b2ad877206b03089dace2811e0cef5f177703

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