Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f260a52ec98272…

MALICIOUS

PDF

85.2 KB Created: 2021-07-03 01:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4f69711ed3e6ed631bb2c3ca191aa752 SHA-1: 5e26f6f2773c73b75665b8adc4869b4b8de67690 SHA-256: f6f260a52ec98272dc3c6108d35a3ae2eb87915014c86a10bcb5bf43e95b9f78
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/743dd136e0cc2c0fba5eadc97c10c2c7/fopubarebikoja.pdf In PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/112d23de039c1fc0c817df758a7f450c/mafelijakezikevibu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af670e3dd11.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1bbb65b45ae71bc2f2da6e21b02a1269/zomokivivovisegu.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/safedetonafutakefi.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/dd0612d25df59d1e513965ef07fcfa7c/32388370131.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/sumanuzogiredutopavujebar.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9d6b2c1ec106fe3f38d08fc130a668d1/vujalaxu.pdfIn PDF document text
    • http://simonide.org/userfiles/file/wujidoveput.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/75846614487.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802ed082710---fadebawiwiban.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/rumodabisev.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/54259458260.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160771de38b256---65507490727.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c46f1e59f3f---muzuradifiwibovebabeto.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021070305470173499.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2bbb6139a90297e451790ef514358937/71269193304.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/bopeniwipedovaganoto.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/pagaguzuwafixavijukijuse.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/6701d26269d83880f33a095a5f7ffee8/juvokemitidesulofev.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d902a455fa---41228287408.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ac337fa22d4cb8804c7c64880c74d7d6/83129623702.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/jncvv0ngjua6hq0810amsj2i5u/zijogikaneloguraxase.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/40378739751.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+a+thawPDF 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_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 9780 bytes
SHA-256: 06e5e78817241bbde8cac48056cfc51bbde7aa7defb08b2d1fb9f2b3dba09d29
font_01_sfnt_off0000fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 19872 bytes
SHA-256: cea2020217e2ecd9fed0f5630b83501c678399ddaf3bdb35f9c57f4aa7b5ad29
font_02_sfnt_off00012fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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