Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78e701bbcda4763…

MALICIOUS

PDF

94.2 KB Created: 2021-09-01 16:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b7f340cae78028e163697a6d421939e SHA-1: 9075ef32e34319fa0560dbb46dd86157e7740214 SHA-256: f78e701bbcda47639346af395f9b9710f2cbe12e319ac158aeab224af57fd5ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a likely phishing or malware distribution scheme. The PDF's structure suggests it's a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p49v925fh3e8megjb8vkq4s2ft/wokurifanexixuxu.pdf In PDF document text
    • https://hanoihome.net/img_duhoc/files/pokubonesikolij.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/rofaro.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123ced9cc523---wotalosisenudepomukuloka.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/53797476210.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/v09gg0tt5ij1c28g60ibkj55fn/66042003719.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53804148728.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/putagizejufatapom.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/57092186653.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/62065720364.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/96362723198.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/nabebamojujiv.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d99261c8dd5---tubuku.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee4d29875c---47653820419.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/74462377087.pdfIn PDF document text
    • http://patroha.hu/file/fodosovar.pdfIn PDF document text
    • http://sooclose.eu/upload/File/59777034699.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/54957500340.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/65716589032.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f14be7f5---wezogizo.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/41424923020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sludgiest+meaning+in+tamilPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 10548 bytes
SHA-256: f991e6265b2766e8a2a69bbab522a4b468bfba284531813617eb1fee8857d143
font_02_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 27124 bytes
SHA-256: 306b1cffc1d0dd29cbf7e77d3533c0965d028a426a835304634a89cf12cb57ed
font_03_sfnt_off000151fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151FA 16888 bytes
SHA-256: c4e85cd671b0bf707c18dc3f8b107cf10f6f60de7b52fb62579a354842006d97

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