Malicious PDF — malware analysis report

Static analysis result for SHA-256 afac6f9b3b2f0d61…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 23:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bf34018bc185e0ba6b97017cf542e67c SHA-1: b80e6517ffc3485fd5b4a206cd48f9ba4b24d875 SHA-256: afac6f9b3b2f0d61cbd4558f14daca214b93e682b3eccb1ddd3a85a7fb2e770d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, presenting numerous URLs that lead to potentially compromised websites or disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://produse-zilan.ro/files/xepigi.pdf In PDF document text
    • http://sl-light.ru/design/img/upload/file/76966771119.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e3261745b---lesegozufifam.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/48663904627.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/nezepekof.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/bumebad.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a0726918c18---vikekekifafikapalile.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b099e45947c---nitokeluxujavutarosare.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/91491852644.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021052005361373499.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/robopugujesepoxibumiji.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/45088605429.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/bccbb25688b810ef3f9d423b6f761c8c/ginawuxuwitumexilijaxiboj.pdfIn PDF document text
    • http://reichspfarrer.sk/file/89600084205.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0252669f36---32107027421.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/85li0ivqcfu4pel6i71dmgad80/81480617238.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b826655489---vudefaxefidetuxopu.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/d166787cf523b0b07b8627a268de4b0b/47873074090.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/1538386416.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dda3ad93264---figojagutiz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af103b8e4b5---bavule.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/nevapap.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/raralipabajilokiv.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/13f12632b623b7f232a7201f739ae8d2/99140203107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=livre+pour+apprendre+a+parler+le+francais+pdfPDF 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_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 20048 bytes
SHA-256: 83c7347f62d3a6e9fcf7797cc0d5e6c736e7c3819204208b8a36eb287d9e1f39
font_01_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 10636 bytes
SHA-256: e69eede8eab8d5fff5003e0b6d5cb9de392a79f3366b36d2c83f2a94d0ef0066

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