Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0d8b6c4c46c837…

MALICIOUS

PDF

75.7 KB Created: 2021-09-05 09:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5617dd1d4a160db635f74977d7e74888 SHA-1: 5c08f58c1a36a67a875ff85d3942dd35dd05503b SHA-256: 1f0d8b6c4c46c837b0df5927f4745b5032f38cadd93ea368892b57e9a58e7e42
172 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b543c6e13d9---wakuzunawegonibijana.pdf In PDF document text
    • http://farmaciafoglia.eu/userfiles/files/16909780331.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/35671960515.pdfIn PDF document text
    • https://jagominum.com/contents//files/37067065768.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/larovaxajarak.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16097cf3cc0802---felojux.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/47801531545.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106211458203918.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/92573635894.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///zuminebikalo.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a1f2442ef1d1a9a7c2bef76644f2bd1e/58308981238.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/8c5b78c2fef03123b3eff2e227857a98/6045721836.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/xosoxemibalaweduva.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/deradorokaweliwedefeju.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/xozesenuzibogalatedew.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/59111741650.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/84416576303.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd6d4529a---xinagawetexa.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/fgg6udftkd0n2latiteunbbcto/suxuvubo.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a36408650a6---46444566807.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/51430642635.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/3397083073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=amerihealth+caritas+chc+provider+manualPDF 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_off0000c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 10924 bytes
SHA-256: a68e82d9095e2a10eac8c4012b85e448a256d6fdff938d0fb6454c50de761ddc
font_01_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 18792 bytes
SHA-256: 291ce7ae2a1ee312f0bbdbc9d045fd44b23c335d099cfaa028b551721e9402b1
font_02_sfnt_off00010994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.