Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60351bee0145122…

MALICIOUS

PDF

86.1 KB Created: 2021-07-07 09:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 273f6874f0c0d25b1492ff22025cdea9 SHA-1: 185d4a1e9c07a7356dcc2388b20901d4c0bc7e25 SHA-256: b60351bee01451224ae8facb668c30cd854b375aa691f3f8228e9b21f60eb235
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to various domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://oniceh.ru/uplcv?utm_term=race+demographics+in+the+world PDF link annotation
    • http://mebco.ru/images/file/nirulemivo.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/72129d2804a76f7be41fb2a47e6aa60d/98518693497.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/rakupabulo.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b890f54ca97---jisupoxigoz.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/71776842185.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/fupamudirekoxeza.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/34451310730.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/21348902247.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/60751759380.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/80247263210.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/d89acce0aa5ac0b74c66f57a153149bd/diledegu.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/zobiviserulate.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb7c92fb9---13423114209.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb59c82c6b8---76035823497.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b770707c629---gaxupalufilawuvenosu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4c3d63b9c7dfa66fc7892ab7c3393d1f/15025164080.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/125416768160bf07f31c20d.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/sewazifapovuzag.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/gabajaxijog.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091d0986b0f6---rotek.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/a1b90bcad2f0a5119bd673ffbbfce05c/kabokag.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/fibefikosenexe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc0b3fb51---xefit.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d34b380c---26799299273.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b1vphcnqulpmls7k2gtems58k4/12215586607.pdfIn PDF document text
    • http://dogable.de/userfiles/file/pumawurojopedunorekije.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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 17532 bytes
SHA-256: 7ac69eaefd6b70da323eaca964389f303d3c7e9515d086371283ac52d259962d
font_01_sfnt_off00011977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318E 11092 bytes
SHA-256: 9040647048bb3f1d4f99e35b6c74a70d1539862a8a9f197749bf4d73b0b5f4b0

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