Malicious PDF — malware analysis report

Static analysis result for SHA-256 f071c00177ad8aa8…

MALICIOUS

PDF

71.2 KB Created: 2021-09-03 11:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ccfcf4f5de99debe3d34e525bba826c2 SHA-1: 3209f47f8468807fbc7b144f0ce51d0d2ecb5216 SHA-256: f071c00177ad8aa8f138935d29019f96781bb627dac628398dba2b1076eba229
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=geekvape+aegis+mini+manual+pdf PDF link annotation
    • http://healthywithhart.com/res/file/pekinobizoxafusul.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/31675749106.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813ab2d1626---83224532754.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/b75nlsimtflj38tfvd8nj1ei5l/zopuko.pdfIn PDF document text
    • http://asoriofrio.org/ckfinder/userfiles/files/51529894727.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/lomobosotiwav.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wejuroposamafivu.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/49591799002.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075788581fc0---92366348980.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/4cc0060625c5480164d9fa8b6cdda05f/52044599084.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/7137301460.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/470ea2dc71729ade33885699b4629d64/dupixivuxunuwelutes.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093b49364139---38791924217.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/simoseva.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/55eb0481a84d1c8de70729dc724604f3/gedidobonawamevozoto.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/tuwavut.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/49426421666.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/f2o5faoiaalrie6eupfl94f3k8/gigomotixadumasiguxeda.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/91161004725.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/tafazolevututizuw.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc5aa6a26f3---12840134384.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/59509912119.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f5e30ce8---57442643684.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/17cut7lgvuobteft62jb7tmlkj/vadonimujibi.pdfIn PDF document text
    • 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_off0000b472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB472 16636 bytes
SHA-256: 18abdf4a2ac0c18782bdf1a668fcfef129f082f050dc0c74f99b8adb0cda0ef4
font_01_sfnt_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 10820 bytes
SHA-256: 23fbc915a5d1585d787afd15d3d6b70a423b033dc0e5837962457e5bc2bc6e75
font_02_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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