Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe4700b8e5d5d8a…

MALICIOUS

PDF

74.7 KB Created: 2021-09-02 10:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a114316a48d9d5dbdd576a8b39afdc7d SHA-1: 1e78f9209d8080593a5dbbd28a9ba1851bc5ded0 SHA-256: ebe4700b8e5d5d8ad8b4e200380ad334ab11877931bbdbe8200dcfc611fb2bdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the exploitation of user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://topclassgardening.nl/images/file/xexusazurijule.pdf In PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/vcanlo7bvesl1e7o09gk6qqe9i/movarewafij.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/8jlhka9fvhgd73ouua8r0cedqu/26937266949.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/joburilogofupebov.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/39238446591.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/63236573206.pdfIn PDF document text
    • https://songhong.info/userfiles/file/nimaxipabodakosesijirevo.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/q525gjovo8d5dabfipcnis92lq/70263424754.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab0a68a663---50642543287.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b155a6b7b19---taporizusozisofat.pdfIn PDF document text
    • http://farmina.ru/uploads/files/56244657872.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/3d0f5378eeb532430187d9c47714b533/nujofu.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/2210613497.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/5u7vbhhh0r23hp958qsrmvp612/26734450160.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/kidiwelaxerujamenatafad.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/nitojolexutisavu.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/1d28457709888f24da2166dc1ad3eca4/52993485849.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/jepusuk.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825edfdbb5b---53462426222.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/papizekotumixuve.pdfIn PDF document text
    • https://call-life.com/ckfinder/userfiles/files/gezaxegebotivuwoke.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/matubi.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/jadijef.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/69085654681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+a+potion+of+luckPDF 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_off0000c166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 16244 bytes
SHA-256: 444908b14488416ed4aca61a9c88fdfe4cb11f2965de5853e930de26a6f990df
font_01_sfnt_off0000eb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 10656 bytes
SHA-256: eb4663c97a497b10733ec15993f0b02d5a6673a60b171d2ef31a717ea7cdd5bc
font_02_sfnt_off000103b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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