Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f1dff29dd758dc…

MALICIOUS

PDF

74.3 KB Created: 2021-09-02 00:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 758f5ce1b8de52c5d5f48adb36da000b SHA-1: 4e16bb3255718414db115f7387970961c0aa2d0f SHA-256: 06f1dff29dd758dc5bbd8bbb250dbe07a84e89273bf7e78ca06f241720f02eb6
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, suggesting it is used to distribute further malicious content or phishing lures. The presence of multiple external URIs and the link farm structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://beastyenergy.com/userfiles/file/46639540564.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3815f1b19---47020089642.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/15167702984.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/bd6a665f6ef66bc6fdf90651b47e3f59/vasumijesaf.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/7i6q89t81cdku4u9hvt9jqqe9q/58504581629.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2mn4hamaujdla3lupc56bim7i7/videvole.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9fed737e79a761eb0d3b3980be60f9f4/puvugob.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/69006491499.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/58251385215.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/76088121004.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e2232840e41c929eb6af4b14e83ffe21/betikapojirajipub.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/wiraxowazobirenujutego.pdfIn PDF document text
    • http://insei.eu/userfiles/files/41469075366.pdfIn PDF document text
    • http://rcot.by/pics/files/51769050120.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/5846411154.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc541c6ca0---zuvajujiborok.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/taxur.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607282762b37e---40307479915.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/52782758671.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/girrmn9avto25hivqstmr88m76/tudagakapar.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/96167956735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=psx+game+manualsPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/89533069915.pdfIn PDF document text
    • 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_off0000bd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8B 18092 bytes
SHA-256: d11984324eb8a1ae003ab851d0333a9597e4aac608053ed23bc6720ce3a67c39
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 10244 bytes
SHA-256: e7dfe24730e1b1463eebc5bc83fe653a5f57d6257b7ec14b25abbfdca1031ac6
font_02_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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