Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb0f306c7295e7d…

MALICIOUS

PDF

81.3 KB Created: 2021-09-15 16:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d5fbb6c4e03697deae7e3fa48e9e317 SHA-1: 48ca1e463ad49b7b80867e0ce6ff52b27499234e SHA-256: ebb0f306c7295e7d82de999236271e2699a9e64812cac9a968d8919702ab2370
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and URL distribution suggest it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://zdrowejaja.com/Upload/file/22815356530.pdf
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/ruvuxukofomosopasila.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/2bnah47runama7ef3bjccjsaj0/valoledoposewoperetijogi.pdf
    • https://apra.pl/files/file/83478401368.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/dodozotadirukojup.pdf
    • https://travellifeafrica.com/ci/userfiles/files/81375114237.pdf
    • https://myreply.mobi/snappshott/editor//file/45651515849.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f58360e182---38741492796.pdf
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/wamolujiferanelurol.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/jesobepumanoletusewepuxe.pdf
    • http://harlit.com/upfiles/file/jijunalamosidosoxebesone.pdf
    • http://moretonassets.net/userfiles/guzuwekujimukidetejuzoviw.pdf
    • http://lemma-studio.pl/userfiles/file/kunexufabirem.pdf
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ginepiruxuke.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/fitewixezetetojopofope.pdf
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/73064811392.pdf
    • http://saraya-shop.ru/upload/files/99698171234.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/divebizisuw.pdf
    • http://ptairsupply.com/userfiles/file/bikevanutimu.pdf
    • http://alvit-bk.ru/userfiles/file/vufasafawakuxozosa.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/b678a7e05ed8d91adc6d6b9e541bc72b/57346089208.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/cf398b2361042641f651c414412e5ad2/setozoparobig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=warship+battle+old+version+mod+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc10.bin
d05751e567cc9f434824d3af3e02ce109475ce3c0de7631b8a2bdd175a861530
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 10948 bytes
font_01_sfnt_off0000f502.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF502 16792 bytes
font_02_sfnt_off00010d14.bin
c3e68ac64276257f8d020547ec6588b969499c68d771da9ccca0a40493438aa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 16736 bytes