Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e231937311cc01…

MALICIOUS

PDF

85.1 KB Created: 2021-07-04 00:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ae9abbf8c38f028087bb270d3ae2f1c SHA-1: 72f7500ae13717e55d83a305f0aa829d4d55edfa SHA-256: 96e231937311cc013930bd98464d0ba1c6e28459d06fb591ac5a942b9eba41d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm, with many URLs pointing to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://netcentricnj.com/ckfinder/userfiles/files/75875075574.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/kopinewimeme.pdf
    • http://botosani.ro/img/uploads/file/66967025899.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0084ca6c98---73415842672.pdf
    • http://anhbanglaw.com/userfiles/file/52033784721.pdf
    • http://alliance-ic.ru/uploads/file/12206191107.pdf
    • https://wipaphun.com/UserFiles/File/rimijedowobilevowa.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62f972348---39612295794.pdf
    • https://cargotavio.ru/files/file/63308631227.pdf
    • https://solidpractise.com/files/userfiles/file/77105347329.pdf
    • http://anpo.vn/upload/files/lexiwopijumowodoxukuguxod.pdf
    • https://dollarplus98.com/images/upload/files/mozava.pdf
    • https://butterfly-propertymanagement.com/userfiles/file/88898602093.pdf
    • https://stef-nancy.fr/upload/document/32701832988.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fda46d9ea4---85927270209.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/f90ac18d3ada1a368256c4ab866daa22/disosevuroxigusanenudu.pdf
    • https://congnghethucpham24h.com/upload/files/dumevuwuragesafimijofefu.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/9ipm474bfl9k0fas0l6f50kj0g/20346529453.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/59349a97a8ca7a2b00468eb41e714d66/51540205131.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/27ad583e396b50322625cc1502cd1c1a/35221372107.pdf
    • http://files.ibiza-ferien.de/file/dukijujisokore.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mcq+questions+for+class+10+science+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e833.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 16792 bytes
font_01_sfnt_off0001004a.bin
7c09b0025ab892e47cbeb15407982db0d730c9f41fa620ba8f3e6a9f5036b9ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10932 bytes
font_02_sfnt_off000119af.bin
4eacf3d49e5675e5bfb8f9c2937a75ca8345f093ff42dac44e55936cce4f7493
pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 17308 bytes