Malicious PDF — malware analysis report

Static analysis result for SHA-256 6470c68eaec2ed82…

MALICIOUS

PDF

92.4 KB Created: 2021-09-06 15:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8819961bb5d5b44f7dcfea1765288c45 SHA-1: 3f1bcd589274c98246bc3a16c258f318e695d132 SHA-256: 6470c68eaec2ed82efc0be057a2e8088d6252f7eee9db9d7c1dbf92592effd89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure and embedded links are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://queure.ru/uplcv?utm_term=renault+twingo+2000+service+manual PDF link annotation
    • http://alibabashipping.com/userfiles/file/82371779313.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/21db702df2519d62d6135a8632efcdc2/73714142504.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/51001763631.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/3728643355.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113cd5242f20---nemefufukusilepatumorewon.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/fupevavidibesexevek.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/zixeraxerunu.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/13659405886.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kaa45bjqgtceqlq45q1ngl3h11/dezerijigawajonisobok.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/mobevajazidadatos.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/wivazegikudusef.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161276d0599baf---33901403373.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/rasub.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/jopamifasosoxoku.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/0h3pfscnb3oepvu0qhe1uj4215/famanim.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb904cb547c---41466814954.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/l78di9unkpducckta1849p7qq5/71079364046.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/damemubufunovizosolin.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lakmv0fb2idmgi828p5loup035/berolidivozor.pdfIn PDF document text
    • http://atiksigorta.com/files/7743591868.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/71678689984.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/zakumejopikogal.pdfIn PDF document text
    • http://teraval.cz/res/file/60222650168.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/9d3ab53e644d5acd9b250e66d13d92f8/satesenofevusaxafeto.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/168c1ec69a959a699452fd00544e4102/72233436179.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/moperifekopixukovufije.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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 18616 bytes
SHA-256: 685c511eb8555328e770f8d06d9687a86b271a8055582a1e5c35df34517eaff8
font_02_sfnt_off00014a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A20 11112 bytes
SHA-256: b03dca365e01944e804e7f02feaebd75866587dd345662dca12df80ca0c85aa5

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