Malicious PDF — malware analysis report

Static analysis result for SHA-256 589082be23ee4033…

MALICIOUS

PDF

73.7 KB Created: 2021-09-15 16:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 78d4d32be61204b38a0ed52de2729f1f SHA-1: 3adaeeb6d7c471210ced9838a69098677f26b60f SHA-256: 589082be23ee4033b0674a536c31a52e99561fc780aa3653b74a5d4ffe999ee7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which are hosted on disposable domains or compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The presence of a 'utm_term' parameter in one URL indicates a potential phishing or social engineering lure, possibly related to game downloads. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=mobile+legend+apk+mod PDF link annotation
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/retinulo.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/kuxagupajowupaxag.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/92669669354.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/45037096078.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/46976546296.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/61274908529.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16135423163d42---vezufob.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/72410481555.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/gigipid.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/jugazetasigenajofexezab.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16133628b362e4---bufijamelepolubewaxomo.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/ziparorenitideweverob.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/91230226061.pdfIn PDF document text
    • https://tl-systems.hu/files/files/nowat.pdfIn PDF document text
    • https://resicolor.com/upload/files/87674258802.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141d38b830ae---79377495116.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210903114508.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/segasudimamem.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161357c8397790---84923875056.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc037bc4c---67188190940.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161389cb2ca130---62197168512.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613219e550832---78521017701.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/80453458899.pdfIn PDF document text
    • https://webmenuplus.com/images/file/luwuragob.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_off0000beb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 16708 bytes
SHA-256: 437cacb2c5b012861d8daa83d846e9949177730cf1a99d425b6144ce92cd6a60
font_02_sfnt_off0001016c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 10592 bytes
SHA-256: e2605b81561f42e5f4c520bfec71f5d27cf65d7e2902c41e0934a800a27f2004

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