Malicious PDF — malware analysis report

Static analysis result for SHA-256 c639dad96d56ac09…

MALICIOUS

PDF

81.3 KB Created: 2021-08-01 01:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a980d65370ba2da7858b4cdf8ea2b852 SHA-1: caa79027815e0fe4a63a0b9ecb4a17e51d38e0fa SHA-256: c639dad96d56ac098cf1b6aff1598216197f29f90a17e13ccd344765a7210f81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many hosted on compromised WordPress sites, that lead to other PDF files or download URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and a link farm suggests an attempt to direct users to malicious content, potentially disguised as legitimate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://crysiq.ru/uplcv?utm_term=my+summer+car+save+game+download+2017 PDF link annotation
    • https://fnb-concepts.com/images/uploads/files/7651903464.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/cfcd7e274d030571768b31187788f34e/dulefakujisaxugesizifop.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd1dd3da2---59913323914.pdfIn PDF document text
    • http://djapm.com/userfiles/file/galomupirefa.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/32766466732.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/78825554413.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/25089580483.pdfIn PDF document text
    • http://knoxvillecentralhs1966.com/clients/8/8c/8c0a3a1fea337096d337135aeb812fb1/File/94659007147.pdfIn PDF document text
    • https://irantruck.ir/data/file/voxifu.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021621327355993.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608082422fd43---26389540441.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607669f29623c---rogilovotenolijufobaxu.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/75663704812.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/10959036681.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/futuwonejozuxamuwukuxufe.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/fff912b66e83a74b38d9098c1e87d83f/85757240864.pdfIn PDF document text
    • http://thedreams.cz/files/73878808696.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/tebumabik.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/nojotefetubuxowajunigunu.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608490b3e6c5c---73116508351.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/fidewinimenog.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e491f0b4205---3868155990.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/xaxufodowu.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc3656324b---58628609932.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/kijusezarul.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_off0000d563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD563 17364 bytes
SHA-256: 53c2ce363ba111d07138b6f510d7eac67a3e0eca75bb5f407c059d01a09d8c72
font_01_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 11228 bytes
SHA-256: 38d6dafe867e49e884af8f95f1589928c49a021213d71e4ce10ac85c18fd2ef7

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