Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63dfc248abb650a…

MALICIOUS

PDF

80.4 KB Created: 2021-08-22 07:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73ad6be7ba9d280bd5d302346995e07f SHA-1: ed8a198db8ce5a7a5857c79d9f721e5e49632f54 SHA-256: f63dfc248abb650a39e0aeed1a87dcdb295d30a918b5b34a881a61f28991914b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9550

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://aromamarketing.md/img/files/zozuxokenopuwikezix.pdf In PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/22147917159.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/mudukojifovaxidalexubo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f093c384ac---zogijerupemudevupok.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1610faa31ca880---97513634623.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75387478790.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/b11b159afb302ab8843f2919f39404ce/19463777403.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077208c9ea97---38924968525.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/e56obtaruidltc3qhh284k2tjr/79448347411.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/sagoxofajamem.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/51756532250.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/sebaluvuxagapor.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/60142153013.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/cnfftmadl7t2qvlcgjvai8v4fh/28224292475.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xalaxi.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/81096517492.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/rfvmu38hbls9s0fks63sfirbrn/sopebililawofevar.pdfIn PDF document text
    • https://termoformat.md/img/files/90923218297.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/a4pp8rguamoe78r7v3ctd9mm85/18486848068.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4e307d76---82394864349.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/97sr9mrf2i6ivsk5l7esjfq5gh/zudukesemitiputudaxuj.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/vosezizijojunilexekebaj.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210608_B742B8158184CD35.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a9fab39f715e4771e411e4d0e66b76b9/96881496598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+great+hanoi+rat+hunt+pdf+downloadPDF link annotation
    • 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_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 17800 bytes
SHA-256: 0f5c8c52d28a71dc4efb1546539b180981a6fc67e9e7c665b86c206bf1a4a062
font_01_sfnt_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 10760 bytes
SHA-256: 18d5bf2cb1eafe3b9c82dec1d704c91f4772746d9ca67d418db5632e86855f4c
font_02_sfnt_off00012860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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