Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f15beff67d632b…

MALICIOUS

PDF

120.3 KB Created: 2021-08-21 17:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 88b4319354f9a50c6f968b68b48e7615 SHA-1: 737925d796213a44e7c5193bf0d957716f195c5b SHA-256: 78f15beff67d632b6887d90389b0a478416bd303c5d85d44f0f41f7fcc5bec79
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a brand-impersonation credential phishing lure for Facebook. The document contains a link farm pointing to various domains, some of which are hosted on compromised WordPress sites. The primary attack pattern involves directing users to a phishing page via a link embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=lone+star+kanata+menu+prices.
  • 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://auroraenergyproject.it/userfiles/files/67583660141.pdf In PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3f8595811---sukedeke.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b46de3ca1---88649947796.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/k4k5r7v4pth8tijjp2bekimkd4/ripinijulotawawumigurelob.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/komululeneg.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/fb3467128f79680c282fb08d5ba453fe/24937088447.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/70307254114.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930aa2e952c---93933683222.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611561edb81f2---83056271461.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/fogojiguwozovesox.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/jh05fpaq9mtp3n6unnrmpm8qso/lezunaze.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/931604b64817f3d598f9dd3d6283a9cb/95559492951.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/62991850918.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/33436525726.pdfIn PDF document text
    • http://methese.com/upload/files/84813257576.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/j89up4ec07prja36tsbet171p6/xitopoxepimivojejevafopof.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/ziragoje.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210720141259.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/gexuwogulikorete.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/92c87fcb0cbd62e8987b23e2618875a5/95422868850.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/17540768727.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/64901806919.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f2565fa6f4677ad1da0c836fbcd227d9/20335199451.pdfIn PDF document text
    • https://actor-conseil.com/files/file/12924318310.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/fotiranewunajowawef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=lone+star+kanata+menu+pricesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15777 10640 bytes
SHA-256: 30a9efd13d884d855b4f3a865ab184ff269524a0ae9ddc930c396c8a61584cf4
font_01_sfnt_off00016fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD9 19884 bytes
SHA-256: 7a5ee3dec6e6e7d6882efb7e74c5c1a79fd323c3465a745c042551b8a9b86617
font_02_sfnt_off0001a358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A358 16104 bytes
SHA-256: 0defef0870559ec3a9bbb8f31a77b3e0986ad4fade5b4cc0f8fe88b0f15c9028
font_03_sfnt_off0001b8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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