Malicious PDF — malware analysis report

Static analysis result for SHA-256 895694d58619feca…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 17:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1554c0abb6467aaa3b44d305813a84e SHA-1: bfa99449481904c28afbf1e14240c1541ee14894 SHA-256: 895694d58619feca117a3c2469202a1c976edde02c716eef97843179d7a2c74d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm designed to obscure the true destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://unitec-egypt.net/userfiles/file/86918590641.pdf In PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/46667852630.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/84900672952.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/gobosoxokeme.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/vuvir.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/fodokirilibipit.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/19165400201.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e045e946c---28498979880.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/nalokapobodufite.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/51516386839.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/sovivo.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/81773430919.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/23511966989.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/zapajazusixaluged.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/sigapidimiwagudakudetiza.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/16034798928.pdfIn PDF document text
    • http://pololanna.com/user_img/files/posawuzesutodifak.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/36414230320.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/62213873994.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/tuzofu.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/21954468609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=android+mobile+application+testing+interview+questions+and+answersPDF 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_off0000d232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD232 17068 bytes
SHA-256: 5135f45b5e8f7861c5a3b869b127c4cd36e1c6c56fdaeed827c6fdcd352e4ee1
font_01_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 11376 bytes
SHA-256: 73b1a03d61fd0a73fd03643a6312547f7c68605e824d64094e9d490fee70998f

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