Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e14a678b6317973…

MALICIOUS

PDF

69.2 KB Created: 2021-05-25 02:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 715c42719d6c73765d8f6ba7e121284c SHA-1: 7311f54b454f0e3147969765f0de72449c0167c6 SHA-256: 1e14a678b6317973802bfd83b261e2eab786bbe2042fe8edc462a03642cc3cb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting PDF files. The document body, though heavily obfuscated, suggests a lure related to 'Bsc nursing 1st year psychology book pdf', likely a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://medvor.ru/uplcv?utm_term=bsc+nursing+1st+year+psychology+book+pdf PDF link annotation
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609473dc44071---fipaxoditemizagu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c2af3bcc---70912097646.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/tapubiwugis.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e51aadf3b9---57292380048.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7f5993ebb---15252720331.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7d05c9bdb711a5146c4fbde59fb0b363/geziguzojupegegof.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-12/20210512093409808774.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080e005077ce---wodawunajugiwafitape.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160719ea87a412---33762931856.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/salefovutupezakelopu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/wofigoxirilixubegadivun.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73ef382f7---23939772089.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e35df06a5cd5914c7844c2216bcbcf11/bunugaxitoz.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/1jj3c6eo3dv6jv99e1gpv5d751/basaj.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e076438a3---48223422727.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 5704 bytes
SHA-256: 871ceccc43dd3dcb14bbfbf18741304790fa175eeaca8294ad1f5d5f4fd12898
font_01_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 10440 bytes
SHA-256: cc7f36cd75e84852f359e39a2afcb8963e2c2b44eb2212bf7114bf52b690b888
font_02_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.