Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc0d54804a5c912…

MALICIOUS

PDF

90.3 KB Created: 2021-09-18 05:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 601749a498768a97bb2f01c2f0f092dd SHA-1: 1477d509f75c459e337fcdad1c45526de498cccc SHA-256: 7fc0d54804a5c912eebdc7a0ebea28f592c3aa43d109df11014e908421ad943b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple PDF files hosted on compromised websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46db07fd6---92546405870.pdf In PDF document text
    • http://bafiti.com/sklep/userfiles/file/dinakajupekat.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/19143986934.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210907_05045928FE05E054.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b29780a9d8---jepunipasoxawomejejubi.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0631b790150883b107b4a5d7b5f247a0/fesadowidokulovagozap.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec70dc6855---17048290205.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331944882d0---zezonupatuwapasepuwagis.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/varujawuxugirowuwiv.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/90913470123.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/fivawemikuxujop.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/nanid.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/faleg.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/virolilutamurifesanefevo.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/75165760174.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/33897287383.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/pesisekizidasukamunazipel.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/48552485766.pdfIn PDF document text
    • http://e-sportis.com/images/upload/55939797724.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210905224913_zg2wiy.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/mipizolamoduw.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/pinedulabe.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/kajeleruxojalipevudewuxun.pdfIn PDF document text
    • https://hiroyoung.com/data/files/vevivizakoton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+world+war+battleship+mod+apkPDF 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_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11306 10976 bytes
SHA-256: 9c26ff544c92f5e77a97a6eff9b8cca60c68e30bec12446989b417a68f6d54c0
font_02_sfnt_off00012c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C18 18500 bytes
SHA-256: a6f67c53205047fb91dff2521fc1a897b1c5a40b11b19f85bd1a866c21e74975

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