Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ec6ff324c68097…

MALICIOUS

PDF

85.1 KB Created: 2021-07-08 12:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 907ad74232025a9bcc44e277a8aef438 SHA-1: f1e5f359008ffe2d85bbb50979c311d036745bf5 SHA-256: 80ec6ff324c680976a6d6e080904160a915ad27c9762a29e77fc7eaaf74c3133
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://synerhu.ru/uplcv?utm_term=minecraft+caves+and+cliffs+ps4 PDF link annotation
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sebv50eic5fdsf2tdrqa9hb1m3/tanalusebujof.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/94fadb1e96a78882a31576b633511494/nonepuw.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/zexawunurikigugavu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608538411bfd1---20775174430.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/033c2962273d3918f79f79390981bdce/mikik.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b6e1e97fe78e057a3c79eeb167438c3a/nuferunevofetopivironifi.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/68090029734.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e7e8f74c0a5d05ff0f28c4356b4a2c3d/pegulamipizobuxafozig.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/10872338233.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b30b215d0---pimoda.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/10398914576.pdfIn PDF document text
    • http://slsnn.ru/content/files/81828906619.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078940f939d4---31131550592.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/79597313470.pdfIn PDF document text
    • https://tycoonmarine.com/userfiles/files/zefejaleduduri.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/48248357638.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/redimomogegofubudijotedo.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/51157815245.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160876d5cdaa82---3021653269.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5628beb4---fotigokigewajefibe.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/42490029242.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_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 16732 bytes
SHA-256: 7264b82c0b79ec177ce3c191e94dbf695d07b9a8010a7808ced3e3d8ae622262
font_02_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 10628 bytes
SHA-256: 62c8a1c7c6e93bd262012919314ba61b4f2b9eb22f7b5e0ce57b5f7c054ccad8

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