Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05369d3125a81fd…

MALICIOUS

PDF

181.7 KB Created: 2021-09-02 05:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 841afbca5b244996c1afd2055e92cbc0 SHA-1: 26cc32bfa2e134a8ff492bf20512e7693bfb2784 SHA-256: c05369d3125a81fd15d3d6a05c3122c8b6384ea1081b98f79caebc22dfd969cc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. These links likely lead to phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/316e67fb92579ba421efe5ac00510bcf/mavuweposov.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4c09rj2dis7m7jo5a5v9jj3411/zefulajarisulewareza.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/56957605024.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/21l0iuu0d0dc31b1srceesiv55/folevumoxoxir.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/e05858e1ccf623ab97e1fe283ed81ed0/gorerewavu.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/wimopezef.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/67340725291.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/jusapedumujiwawojofoze.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae74651f8ce---91556791275.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/85594201986.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/zajofave.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/zaximepeloxolarukutug.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5cae122161bbaa701d05cea07d284896/42451717951.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/o977j30gfe2qe0q8ighgrlipmj/gebebibovafizemis.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f162e90b07d---wetenixesexa.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/kodekumoguwo.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/mgggu5kna1cig9aom4n2au80l5/52249419589.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/afcac3dc43c2ea7433f7bd34666baf9f/80377012184.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d01ec972225febc5282fb9540b8ec662/77365130233.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/megapegaje.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/977ac850f001e751fe480339facd96ad/sefunegojapobodu.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/xegevobowuwabifar.pdfIn PDF document text
    • https://agatanorek.com/files/file/bimisejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=luzerne+county+register+of+deedsPDF 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_off000269c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x269C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000281dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x281DD 10672 bytes
SHA-256: f8b051d924df48a17b6f755ac96144eb25e6b740f13e6b30ed03c0913648ad46
font_02_sfnt_off00029a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29A4A 17948 bytes
SHA-256: c98a58dfe1324b23f90c5ba0722393edd0efdfff6dd5fc4e58987de9c3cd5b66

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