Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac74d972757100a…

MALICIOUS

PDF

85.8 KB Created: 2021-09-23 22:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 861b73969be2572834c853273365ee9b SHA-1: 78520781219c84d5fea01ab3063791fba320581e SHA-256: 6ac74d972757100a49e6d07210e525407658b0592a3a3550411c4c33642d6a81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=technical+tezz+ertugrul+apk PDF link annotation
    • https://radmangroup-ye.com/rgfiles/file/fejoxonadedul.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/82773798035.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613459f1b7ed6---lilolemov.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/razosa.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/18419489.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/jekotoguna.pdfIn PDF document text
    • http://huarong-bio.com/upload/files/75132469481.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/kowuzedejufaxomunemi.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/30551946114.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/206a764da271f61bb7f38ad52554bf54/21696804738.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a071d968a01357dc2d496dd5d47dee86/70962180584.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c12b88e48e---kuvufilomojerefota.pdfIn PDF document text
    • http://masonhn.com/d/files/sarat.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/fizoguzusumabuligipi.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/benaguzubopofinag.pdfIn PDF document text
    • http://eva.am/files/f8d7e0a554a9b90f.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/15743666905.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd56b2d42b---vilarulatominotolovilo.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8568ef3af3fc4f72695c99e612861905/1954194833.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/52745959436.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/66499276378.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e2abbe3ba---xizepalubezinapuron.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/bobanow.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/95368299762.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/bapotadedeximafela.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_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 10580 bytes
SHA-256: 8657f830be9dc6fd230e615e4a609ef7fffed0854a7f06b2cbd667842e99b86c
font_01_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 19260 bytes
SHA-256: db2a52b7b4a86aa0a145588f2a06b9bd1ac323ec0106974e034e4af72b7d91c7
font_02_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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