Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5ef9babad5e31f…

MALICIOUS

PDF

88.2 KB Created: 2021-08-25 19:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 06b7c09e5e4ea9715389471392c1f5de SHA-1: f40539af19accbdcf1ea680a5f2a39fe8a68b030 SHA-256: 5a5ef9babad5e31fa341e25ade93b979012123915facaab529ec8bb1eb9dc375
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://big-affaires.com/img/pics/files/norimibakofidopirixunej.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d7efd5bb1829639eebd98c30898abd59/muzip.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/84116788063.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/27630449636.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/xikaxazeraja.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/talobetegujafugino.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/rawixutax.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/ninotukilodomimigoba.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/68665012422.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e7778a6d---2398078643.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/58090935258.pdfIn PDF document text
    • https://citytrafik.nu/images/file/86431667909.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/33259454011.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce35cb041---warotelubutu.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edc665e0e3---tumotijukebegek.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/mebadowolepasibewe.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/biwevobeseba.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d851c8bf---37177597343.pdfIn PDF document text
    • https://penal-garazh.ru/files/81822568560.pdfIn PDF document text
    • http://contactconfiance.com/files/files/waxitumiruviwogamaroxepi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160de104a6c280---6535389178.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab8b6a489---berokigixelan.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a332fe2919---49143473145.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/zufisazosojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=coral+glow+fire+ball+pythonPDF 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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 17608 bytes
SHA-256: 6a13a48674cfa54b87e0ad448b11f8462f100de124a0dafefd25c50958751bfb
font_01_sfnt_off00011fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E9 10840 bytes
SHA-256: b7b1356bf6dee8e724124a8110a9e42172f2c310601fbeb8f15f0c830c24bdd5

Open this report in the interactive analyzer, or submit your own file for analysis.