Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f80713e69a22d58…

MALICIOUS

PDF

83.0 KB Created: 2021-07-31 00:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: adcbdce341050d8a3a632fee53c793b3 SHA-1: b74a668cae825f394327a104f1f1c7eedac9eb12 SHA-256: 3f80713e69a22d586951030731c14cd2d9d5751d10cba918ed43e41a7a007932
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress uploads or disposable domains. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://immopolignano.lu/images/lowilupalot.pdf In PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/xibixos.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/62122121895.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160825d67890d4---16709381220.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/bhmjn0a89v21cma2gnpkc1a4mu/lulesafavupetobotenakefid.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/279061ea92b05b5e1f5175d358513970/39235172512.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/f523abed802c73f2ebf446532d9cda8a/92113492961.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/lalokinopibabexikote.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/97802202445.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/gavudorutudalopefufupemat.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/38415953892.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fdd72c792---xifuteditarozatesigenuweg.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160866b30e7038---samuligaz.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/a7d52e15c01c09935ce9a77e6faba908/rivikoxolonakupelax.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021073007305750.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/91292315639.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ggirq30d4ecrnjd8jotufmpcve/jowadekuxotosol.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/bozolevijagotimepawadet.pdfIn PDF document text
    • http://tipiland.net/upload/file/tebanumozosutinavateja.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160872e2c41ea3---90608651499.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/17466219733.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160f72796bf033---xikenusoleliwofidafexa.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///fuwederigu.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/degugifafamilefigubapesi.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/94040972159.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b456ab3a3---palowifemosisisevavunage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=inductive+and+deductive+reasoning+worksheet+kutaPDF 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_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10896 bytes
SHA-256: 1a1229486798bafdc69af19547f2698aa20627ea35380fb2769ea49c84fd0dd5
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 16472 bytes
SHA-256: 142670b526cd257bca367d6709252a00ccfbbcd6382cf3c63541c68544cd5baa
font_02_sfnt_off0001253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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