Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2d1f69da09aea3…

MALICIOUS

PDF

72.1 KB Created: 2021-08-11 05:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8caa61b1da41006a02c99537e91d5868 SHA-1: 89462a8ab932177e8409c779c5afc21a9cf8bc41 SHA-256: 6d2d1f69da09aea3cacf024d6abb35e9a8731f78732fcccbfdbdef1154984094
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/6ab844e0c0cdc3b1c22e8cbe75b437ea/zofokuwoterotaxiju.pdf In PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/fae23c1ace0cf9f76f7f7d33792f7893/21871822131.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20348d007c---63559989643.pdfIn PDF document text
    • http://househouse.it/userfiles/files/61705987283.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/93371566514.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/54343100469.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/zoditutogedumawog.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/hmng29f3hsenhj9q92k0c04rg3/vowekatonobeb.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/ludaniwapazomez.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcce22c4c---66136593411.pdfIn PDF document text
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/57537681528.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5550f5aa18---67912329950.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/vukokatiwomolixe.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9db640e06---pinonarodebudamagabul.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/rodowovirebivimesapupawe.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/vt3htjcac69t5ln5riielrdubp/jenanizefabegirefejonowa.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0671e4332ac6958f27fcd9f408a8d237/18330614645.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/ravanitelerupi.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/12378614834.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/37273681699.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/sewepebagup.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1622767359.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kekuwira.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd345e0ce---53027269466.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/nupipupegobulevile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=manual+de+activismo+politico+primitivoPDF 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_off0000bc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0F 10836 bytes
SHA-256: dd28b26b1bc6de331036febfc983de28724e47c4b5f64df9ac4b6db04eb52826
font_01_sfnt_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 14828 bytes
SHA-256: ba70bbb643a20170273ca64fd9487a7e98d96faa7abcab5e455ebfb989f4733e
font_02_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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