Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf5f149facd1007…

MALICIOUS

PDF

79.8 KB Created: 2021-07-13 13:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f3e215f612b993e579913de342f3247a SHA-1: 903f4050f06ecd69f32f368b9dc11fc05dfa50ff SHA-256: 2bf5f149facd10074e4a0286c4613f56290ec021f9ba41eb4933df016bb1b82f
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. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/u7dkgrahgafa1cg824bqjs2eld/menamenuwafeze.pdf In PDF document text
    • http://jgbt.us/pds/userfiles/files/87811166081.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd2dd7938a---3734693818.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/15864178915.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/rojedofuxadofolelaruleved.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8b2e93b38---podobumiruninevolowo.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d6f44d8f55cb72a82d5e09a095f264ff/56234654130.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb59beb952---29836723091.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/35780852914.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607858bca1234---visukerifu.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/wuzekoxelajagamisubok.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/30779295458.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160759f78d41e4---lunawesigutuno.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d3cf350dd---gelupewa.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160912be1ebe6e---nozevakudaxarukigekugi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/taresaji.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///luraruwoke.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c201577ade9---70132439865.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/ludikimobixixanoxus.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/58964524386.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb644e35e---bubarinitutug.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c73bbacd---pibexuwanuvoxigu.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/98973489828.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/xatunogevokanipipiwatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=materials+chemistry+frontiers+impact+factorPDF 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_off0000d466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD466 17032 bytes
SHA-256: 1419332d8e618702fcf8655647b3df737359b351c98d8ba20ec72ce1fac90655
font_01_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 10852 bytes
SHA-256: 5c092585ea9389a98b34d0a5df9f037f704bada92da120a02e52636df04995f5