Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ae560db40142e2…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 11:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 849baecfb3b9a594bdd9d0be75b83a2c SHA-1: 17b49696e5600ac21ee8a0ef76b145e3edaf087b SHA-256: 14ae560db40142e281cd3099bcc98323633d907c872702507d680a2fcdb12702
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Several embedded URIs point to external PDF files, with one directly using an IP address, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and URI usage are indicative of exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cristalparkhotel.com/ckfinder/userfiles/files/pajugokojetusesodubinegav.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tuzogixabibuzizewume.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/pozexulenalore.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/63773518824.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/sizesorenexejumakopavonu.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/23731124093.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/notajanakoxavitev.pdfIn PDF document text
    • http://topas.lt/userfiles/file/pubadop.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/kupukebazelejozijizumi.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/tubejovedip.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/sosiwugovepavegoko.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/wezazonuwipefuzor.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/titogigazi.pdfPDF link annotation
    • https://oreopay57.com/ckfinder/userfiles/files/wawolawesex.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/93534181774.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/34825734253.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b4e5d77dd---najul.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/xejimadogonetuka.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/mumonurulonupoxe.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/43675366416.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/fivuxatufofajofenisepa.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/1200004233.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/79091291422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=miui+poco+f1PDF 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_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 9808 bytes
SHA-256: 5ed05a668961ced55222213286180de32fbecfd61cb52fde308aa47b44327ddd
font_02_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 18528 bytes
SHA-256: bd906c0c3b484aa80f16b3a6396e2127b07ff0a04ed8220440a1c32269a6be66