Malicious PDF — malware analysis report

Static analysis result for SHA-256 06da2c9373dd578f…

MALICIOUS

PDF

74.0 KB Created: 2021-09-13 18:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 455c4610aecf85d71385fcb3ccc9772e SHA-1: 46f62c39a92255fb665fe9084e9e5d622b539e44 SHA-256: 06da2c9373dd578ff3f5701dcfbd9644802f4e2ddfb9d7e2ff74dc37f641334d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. These links appear to be part of a link farm designed to redirect users to download other PDF files, likely containing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • 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.
  • 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 http://lightningriskassessment.com/ci/userfiles/files/rutizemililijapo.pdf In PDF document text
    • https://hanomanberjaya.com/contents/files/kazidazinixuxafibomap.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/kezas.pdfIn PDF document text
    • http://moneymaker-gold.de/files/mokokilur.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/xufewogi.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/nutexomog.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/gugiziwusalasumarobodo.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/37349538450.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/jararilarofizekegajolin.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/paloteriboxopoxoju.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/zivapelazajidiki.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/fopitarojos.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/82f02df56af98a4b243480988169e837/gonibapemijovoxonazi.pdfIn PDF document text
    • http://badgerhillfarm.uk/kumim.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/65032217738.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210910160636136618xdmdd.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/vejaforagutovosamorafoja.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/lenamodamisipunebijo.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/89504180324.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e76fddaff---86526892806.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/jorexikodidumefug.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b221b7d9ac4cc065171462b85751669f/97491906001.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/votugogedifaxeludi.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/76614302288.pdfIn PDF document text
    • https://tele-video.ru/upload/files/ravumofidum.pdfIn PDF document text
    • http://sinostandards.net/upload/files/77016540697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tom+camp+mod+apk+downloadPDF 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_off0000bfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAE 10224 bytes
SHA-256: a287e5cff4860a281975f4f7372ba8859a7646307268908a7b639e319e3722e4
font_01_sfnt_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 17132 bytes
SHA-256: 032528cb072e4d0256200f4240e1eac931c9d31eea689dd9f382f19de6f85e52
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1