Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1d06a8b9e99d8f…

MALICIOUS

PDF

101.9 KB Created: 2021-06-26 23:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 48992d6aa66f2144406cd7b9990ea794 SHA-1: 000ecfca0be007fae8f1a2c90e889eb25d28d9f3 SHA-256: ba1d06a8b9e99d8f8052912c9b5a06db2b83ecce1afbae7cad128b2473cf1604
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress sites acting as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ov0cn0pn6achq51ad1m8rqi351/11037223771.pdf In PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/agm0ea273ugqu0hbf73h5ove55/12785287889.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/xuwupumosapavisugutijovos.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/27929e25afd84b0deb2f69e78bf70ced/11500335053.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a8934fe93ccd1a59e042233073ad0a0e/retutevomuju.pdfIn PDF document text
    • http://renovator.cz/files/file/19362305565.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088709cb1c11---46830590348.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/if3ul0jciaeirfhsoo9encf9ca/43602988634.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/lonovosakoloredivufa.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608230f4f163a---girelubuxojuparuxot.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4u4460pbd6cqk8ubgrisamprl3/50318238042.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc86cc4a2ff---68225682255.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b949acb2---tekabugazebewuzimifevu.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/30094239503.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/89d72f272eec186a389cf54afaa87a31/vorixuki.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712ac10fe59---muzajedodiwima.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/c7915974c8237500c0929b5be1e0efb7/49368404922.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789266294c5---22653404147.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16094e60129082---98240855701.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ca8tn320jbkbecarl0o8to3of7/tofibewal.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/180unqdugukc0bv8gm3j15fqci/kiwaxif.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/5649c3604b352fe8dbe2f3f2ec8240e4/gizetalevumeranepojil.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20dfc62c4---32062802074.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/vabesutekeduva.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/nuvumetuburabe.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p6bpngd2k1hvbkmmmugdotvio2/resaboxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=valerian+and+the+city+of+a+thousand+planets+full+movie123PDF 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_off000124a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A4 19252 bytes
SHA-256: 1dc8b55b83409dd1e7c1b2d69a8e9f1b9dd2928bdefa1c519d27bdecdda26761
font_01_sfnt_off0001568d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568D 11480 bytes
SHA-256: 73daf2e5398d8173cd2cbe690e63da3a0dd83455a7a3f19a56846ee09244e14e
font_02_sfnt_off000171a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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