Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f14286d132fcb0…

MALICIOUS

PDF

175.8 KB Created: 2021-06-29 23:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aa1d6c65fe326b0df55599d45f6a1e2c SHA-1: 33ceb8a786e5cfdbc37a04832d4c155352c7f839 SHA-256: 88f14286d132fcb037c2396d9187225d9a8facf9e636f86237c1559bb6bde9cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=10th+biology+text+book+2020 PDF link annotation
    • http://timandlor.com/userfiles/file/79009033789.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/91033482499.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb35fbdc43b---metibavinatenimedijapo.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/torakusubekev.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/acf8b04870c273968b70bb3237134c80/59817222242.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/bomabijerinimekusavapuzud.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/gubibuvidefuduzimi.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c798830b507eaa47335c2718ea3f4aea/nilemabazutukume.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083f0e93b383---48829178187.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160827ad45da5b---92771352753.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ri0lt7jav4bt53tv08oq0le8l0/kifegobobokepoju.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/65230658817.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab69001049---bagusipojizuvebivugom.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78cb04e547---netegifujuniboxaxugese.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083edc29ead0---33564351057.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ea4c38e5c---25723253134.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/61286461209.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/976a8ff59abfae70adbb75cb7bc7ec6b/sasuranexenivodatizusixo.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f342f1f3e6---pesawisax.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d69e27820---34742450903.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b290e6e4f---25078954456.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1a435685e11bc2607c1b300ab747044c/29287561698.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/sebelinavutatag.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/872871d58fa5aa1a8febea4c6f28b337/69685247994.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a115fa08bc7---87127707268.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_off000250df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250DF 10500 bytes
SHA-256: 6b13e848c7e64cd5ddf6cd6b10b3cbd7be0628b604add6df0322dfcb9f91221f
font_01_sfnt_off000268ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000280ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x280FF 18364 bytes
SHA-256: 21ad3a7e1797b2cce071d735a9c28c91d0f0f5ba07fa2612964ee2882f47038a

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