Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded7ba9ab0e332df…

MALICIOUS

PDF

100.0 KB Created: 2021-07-31 02:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 74e5c03962f0fae3f44d5270e13d94d7 SHA-1: 7e64e4c7b7369a9912836f74318fbcd8deb35ce2 SHA-256: ded7ba9ab0e332df898b901a8b09789747951be5c6a2071d87ffd0f40117693c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable domains, indicating a link farm designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://hqshop24.com/userfiles/file/pevumomagegexikefuxime.pdf In PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/lmn026s7ldj9dsum2q0151jqui/dawigiluna.pdfIn PDF document text
    • http://sun-tes.ru/files/file/49474779888.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/lakukujuvirilisoxuwosap.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4437beda34---ralamasanaxigivatufiw.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/77866824431.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/turoseni.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/xorut.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdfa5bbc50---78854214181.pdfIn PDF document text
    • https://nadamasristorante.it/file/80012552619.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/winula.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5lam00393o72jq7ecqi81310l5/sefinonofizisazisimumo.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/mevenukinabuvolasivodas.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/9jlata9tilucab2ktiehav6q47/48294073639.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6897cae26---24132627869.pdfIn PDF document text
    • http://kotolantopeni.cz/file/5395816662.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f24244669---81999607214.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776e5d89ba2---97308035831.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08874002f---bujuwaxukidovesavu.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/dakebujuxemikad.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/b540e0beb30d70db6dffa14b5a9f782a/6035091692.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b33f19354f6---gibedofiluz.pdfIn PDF document text
    • http://allycatering.com/userfiles/wirod.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/zopofonazaradeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clothes+flashcards+printable+pdfPDF 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_off00012401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12401 17516 bytes
SHA-256: f0a40d1519b2bd6545d21be2964c08a994b9fdd2bf0a21ff3126e9b4b0700104
font_01_sfnt_off000150ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150EC 10888 bytes
SHA-256: 5391952295028c84545a3a754966ff801a1dc739f502231ad6eefab2d4a171ce
font_02_sfnt_off000169d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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