Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66cfc1958b0fc92…

MALICIOUS

PDF

86.7 KB Created: 2021-07-13 15:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1f8f041ef3a3d056d0fad15e6391dc5d SHA-1: 4fc949e2f9fbac24aa47d1c7da60463fd8bc64c9 SHA-256: e66cfc1958b0fc92e068819212877c4350e9c23cefe9a68fe7c846ab726915fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution site. It contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tunglamgarden.com/images/fck/file/pibepelom.pdf In PDF document text
    • https://lesfeesdelhetre.fr/upload/files/82001588870.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50ae5e6ce9---89418903490.pdfIn PDF document text
    • https://nada70.org/userfiles/file/91224116188.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/namunikakowekitezotusin.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/guwezenibajufo.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37df199c3---4652394920.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/luda50v9ic03c2qgdlqf83j7n1/wavodotelodudode.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/xojoxukesuluxulojixuduzib.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3da8a2462---42290958221.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/jimiwegev.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/082c344f5e5b121e2c0290f1750ab66c/kelapadat.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/d1a1ed4d8b28d9cfcc1ff577b9275b63/rebezinuvogofukozugowa.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/raxewefurenazodebokukogi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9f4fcc220---42851649419.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/63620608330.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/f7fb2dbeec53fc27049832ed3ed62902/fenuwevov.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/gefagopuwitumijasarewaz.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2137ej1qioih0g80vhn0pdmkr3/31215948844.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/hg384t43gprov8i6mdra70jc76/6256653308.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/21988131582.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/e3oacgusg9kaa22celtj5gs3ns/nedexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=is+eating+apples+with+peanut+butter+healthyPDF 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_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 17684 bytes
SHA-256: 9eb36b7e87e0855cf95861869ca115545bade895e8cc4a8597c7484549cba859
font_02_sfnt_off0001330f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330F 10804 bytes
SHA-256: c0ba9527c101074e38d6f764f460b95381dbc91d3624d19d832cd6be1b5c4dfa

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