Malicious PDF — malware analysis report

Static analysis result for SHA-256 60efc52aa250e785…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 04:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6e05ed1602eec1fbc2392c0d168a7ad1 SHA-1: fbab490ebf8f4b7901ac461e1edb00287ed700d9 SHA-256: 60efc52aa250e7851876fbd8f1ebb098f3415af98e70bdb2c924b76f8b7f7d9c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various PDF files hosted on potentially compromised websites, suggesting a phishing or malware distribution attempt. 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 security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://himalayanwanderer.com/himalayan/userfiles/files/gisadukopujujizefefo.pdf In PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/xajafe.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/66491860762.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/zilujironini.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dfe0cae381---vatibena.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/gugalo.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7f85acc8---rolijemagopugizatabonaw.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/oqmnrhoudif2uulmi7qp7l9tes/vemuwibufikipuxejusoga.pdfIn PDF document text
    • http://www.bandungmesin.com/file/givezakodofupatodi.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/sabiximibejuluvu.pdfIn PDF document text
    • https://slide-bearing.com/d/files/52901973324.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/29287791390.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/nosowawivu.pdfIn PDF document text
    • https://morabia.fi/images/file/nosalabam.pdfIn PDF document text
    • http://babamoleskine.com/files/file/xubupipononuvuzejoz.pdfIn PDF document text
    • http://partnercable.hu/files/58637634095.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/70295566774.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/fixesezabupilezezubokugif.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6fc9c16560fd82fb84357a942f3a5bf6/fijufuxuxa.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/jikapuxagufakixuramu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pdf+remover+freePDF 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_off0000cdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 9912 bytes
SHA-256: a80e3db674b3693b4109fcfdd884b3ab834c1a701c1b8b0fc13a977fd916fa01
font_02_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 16916 bytes
SHA-256: 0539effd7aefec174ffe520deea5d74334d8e2ab6c320546540397e9f9a004ee