Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed7ec983e7386ec…

MALICIOUS

PDF

83.2 KB Created: 2021-08-27 17:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f6262c52d409d20d2366a942e1587e39 SHA-1: 2aa0c9dc5051638d60c1211f0f8b2e625799ee91 SHA-256: 7ed7ec983e7386eccd66fbb04663927291f6a6ef509efc7e332c440bf40d4e0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URIs and link farm indicators suggest the document is designed to redirect users to compromised websites, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=meaning+of+endogenous+and+exogenous PDF link annotation
    • http://autoscuolavalerio.it/userfiles/files/wupepazovas.pdfIn PDF document text
    • http://119pump.net/d/files/82023852821.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/9jshbt99o1g42kamalq0ja98ih/tujilevolasefetonepa.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a28ae651f69253691eb5231507c42709/dazixum.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb5676bdb---44960859131.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-2/20210602185443242008.pdfIn PDF document text
    • http://asfalon.com/__files/file/43758994273.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/somujanukofu.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/ranitosurata.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/kufavajakitigake.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/detidetixosesepozuv.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/galotegikim.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/3919220295.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3a8cd5e0e---74915183526.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/70588084032.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ifjqnjnvl72n9k2l25fgdk3deo/sevaruteju.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fa5c6c62442bad2196bfe98e839563b6/88337310592.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/lakedefozub.pdfIn PDF document text
    • http://teraval.cz/res/file/76565487320.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161125e57dea42---78806627373.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/bujefu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118bc655fc76---9295068390.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f5caca47acbd69bc109d69796874b509/mofulepetot.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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 17992 bytes
SHA-256: 5d8729cf007e8daef83792df49fe5ab3567cc376b10d0232f1d4cc794ff37b4d
font_02_sfnt_off0001265c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265C 10480 bytes
SHA-256: 690230cb2785c09512816e49f9ad8d01c2fc52bb8072a1a4478e1a8c3b4c6baa

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