Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b362d066c79a41a…

MALICIOUS

PDF

83.2 KB Created: 2021-08-15 16:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0b433dd8ae33816f14ec41971239bc94 SHA-1: 85308f2b8d5edce484f7299a855309b4785ad810 SHA-256: 1b362d066c79a41aaebe195187582471cf2b54f71acaba99791700344ce7184f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add8edaefdc---damolujonibani.pdf In PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e823cfe1d6cb2c279389bba58252f78f/37055898350.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9d7293f92---70125442219.pdfIn PDF document text
    • https://angkalaris.com/contents//files/zinuxawulafinidite.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/40614614672.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/67440964138.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/40035672888.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/95585957936.pdfIn PDF document text
    • http://philboyd.com/74298750356.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b31d897a73e---zeposonuverunex.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/korijafuw.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///zalukev.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/sutozanixep.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/noxofifekejojiwenipuluw.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffd69f8ed3b120f63c344918c045908f/dadexamaz.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/40597697069.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/dupuwagowewepujepazufipek.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6d52804f734d18444eb389bb133e3b27/48529962537.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021541618384946.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/usfq65v9srfkomckg4e8ef1sl7/zovoxilixedu.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/famusetijulo.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/bugosubefuvupotatulexa.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cbbe16158---25716313435.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160818fc31da60---68537000950.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b009856e06---tijodutiw.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/39827222997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=can+you+get+free+robux+from+promo+codesPDF 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_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 17176 bytes
SHA-256: 94f82af5a3dd387c4146f0b27f05aa39b487db05dc08816ce5f6e1d9471a6f6b
font_01_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 11312 bytes
SHA-256: 7a323d56097195c0acf08ac0fdd5c1d2814949245e429e9a54df11604e025e5e
font_02_sfnt_off0001270c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1