Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19f27d2441c1b37…

MALICIOUS

PDF

67.6 KB Created: 2021-09-22 17:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cce5569e0cd3ae68c69c8b490e25ff78 SHA-1: e9c415c5e2bfaf1f5b889291306b7425e0610482 SHA-256: e19f27d2441c1b37c89af0625c19f7010ad198f8e7d3db36114ee548f097388e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a phishing lure due to its image-heavy nature and embedded links, a common tactic to trick users into visiting malicious sites. The presence of numerous external URIs, many hosted on compromised or disposable domains, strongly suggests a campaign to distribute further malicious content or conduct phishing. ClamAV detection and ML classification confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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 https://allytemp.ru/uplcv?utm_term=porn+photo+editor+apk PDF link annotation
    • http://orvositudasbazis.eu/images/upload/file/16409907272.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/dididajamugiboxijukifakog.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389f727f707---dabujoronidije.pdfIn PDF document text
    • http://chpcentre.com/files/file/44502962427.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/58384155303.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/parogijunefufaxiwazitamu.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/doviposobiba.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/konavopajuliwimugezupoji.pdfIn PDF document text
    • http://c-six.it/userfiles/files/11472964697.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/6984126026.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7af41c06a2dd3309401535ed125a8710/midibixudanejuvupiwero.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/xuluwivarimuvevusijes.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109032219038212.pdfIn PDF document text
    • http://rcot.by/pics/files/jovubofazomujil.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/lozegamagibowiwefaguju.pdfIn PDF document text
    • https://tablouri.emilianchirila.ro/imagini/files/70606679610.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/medoporuxexupufugo.pdfIn PDF document text
    • http://garderoba.sk/images/_file/jobigalis.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/mofonovijepatugomotig.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/fonito.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161488626e7cb8---jesumepesubipovozarepenel.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e6936900438fec71f9ce04e1abc66f62/86165837290.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/29585116993.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/90145509856.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3ac72ed8e---fuwejawumabamuzelogeg.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_off0000afc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC9 10368 bytes
SHA-256: 9258a2b2234f7cff267aca54d143564cf59afff1fcc1f98dc5cbec6255cecd72
font_01_sfnt_off0000c71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 14288 bytes
SHA-256: 13c6955cbfc9cdb39fc80bc5e2d27f6fc1a4ab747ca2942393600168f74893f9

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