Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cb394b773327cb…

MALICIOUS

PDF

69.4 KB Created: 2021-09-13 13:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 529031ea5ab53d4bf349a757182f4b3d SHA-1: fc993c723c8da0a40f0bb76661fab6ab96646525 SHA-256: e0cb394b773327cb367e72e4312f9b1a24418e40b1f0c27f55ea2a4edaf22f59
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely intended to trick users into downloading a malicious payload. The heuristic firings indicate it's an image-only document with a click-outward action, typical of phishing scams. The embedded URLs point to compromised WordPress sites, suggesting a distribution mechanism for further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137cbe602857---wilewomizamem.pdf In PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/2867985870.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/lomojukibumadewu.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/digakaxizurapowibosovuw.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/89529711587.pdfIn PDF document text
    • https://penal-garazh.ru/files/tosulevikojivixidoj.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/nekafedatav.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5c18ecb9447da8771bdc0546604c5654/18005353715.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/q7prki11jj90vv8c1nfdj1vr1e/24019306841.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/negopejafipolife.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613616820b6a2---41779460302.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/97475811712.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dawatimutosuvagozuko.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/92998586735.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/fabelojawakarakowujigaja.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/zubojufudap.pdfIn PDF document text
    • http://srilangkapools.com/contents/files/91569909007.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/duvexebipuzubanirunapo.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/lewobusun.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/31155499262.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/dajud.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/puname.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/dbdbbdeecadd35e0082f6f6fe3c95f85/nupekunoteruruwavateribe.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/fijilifore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+wolf+of+wall+street+german+streamPDF 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_off0000b2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A5 14156 bytes
SHA-256: dd6008a2c428a4440326fec99678f3a789b9a83174161cc722c87983169a8da1
font_01_sfnt_off0000d5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 10620 bytes
SHA-256: 63b5d00f6febc8c97fa6d11cde659137d81be0d803468031717985ce4a8cd251

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