Malicious PDF — malware analysis report

Static analysis result for SHA-256 b745d4c9dc98d925…

MALICIOUS

PDF

88.6 KB Created: 2021-07-24 03:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4bb52a903a06cc29065e6c6e482ca6e6 SHA-1: 47d5dd73cadcba376b3e89c40f243a0f31c9f009 SHA-256: b745d4c9dc98d925db6ad27acd8a0b9d83c3aaab3e38aa8979ad605355af20bb
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 high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites that host further malicious PDF files. The primary goal appears to be directing users to these compromised sites, likely for phishing or to download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea78cd2e5d92fc7c151d944a53b74d6f/sofogodosijaxukikamu.pdf In PDF document text
    • https://panificioilcavaliere.it/userfiles/files/jomokuxosekogebi.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac45e8da93---36095713166.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e185182d4a---rimipiritudoparik.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab17a1395b---49578523180.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/8321719828.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ceba7666e---58498155350.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb9cc2ef90---mopitivapurexavor.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb8ebdc1a5---wapowunujizovase.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/58216247958.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/51161069462.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/44rjg73bav10adnaf9bcopv316/43224986122.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/visapasojezatavif.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/dobatowa.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/derorakupolimidilowekap.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/66700657889.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f9e0b01df---57784488776.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/gedoxu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5c46b5c93c98244b380e078e67fd1e3c/79305461582.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210620130739_p5iay9.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/47688167542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=volo%27s+guide+to+monsters+pdf+freePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 10784 bytes
SHA-256: 454a009d56799f07abe52cd4eb79a2b0f0a5e75e8c27edc90991e54d0ae3af2c
font_01_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 18112 bytes
SHA-256: 6b30d16c4b1a0023fc4fd24f294afee20b8715d347677f7cf3391fe08166d251
font_02_sfnt_off00013a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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