Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6e067e62c01409…

MALICIOUS

PDF

108.2 KB Created: 2021-06-20 03:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ff5b4819e8ec4b3925b5044ed657f04d SHA-1: 3ddb4783991d7024cb4c66668cba3b048d295980 SHA-256: 9a6e067e62c01409c4d7363f426f0a225d024baadf9bbe091a4d1fa91090b417
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7835

Heuristics 5

  • 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
  • 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://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/gakoxez.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/05dca562b0dafbff1a112b41323c25e0/6042477879.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f7843b4ef66c3a95f4bddb44a940edc/zabekejiligesu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91fac7d3d5---12590454913.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8dd3b6501f0688070b5e7a4001267f66/fopit.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/lavazoda.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/586beb0a80433bcd1743bcd3f7f50a26/fotikiwasuvel.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e4b420fe---85077909329.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/77772700008.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/75530gcorg9bkedfagnemiirp7/4389899624.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/6t346o3p05emdrbmatjv9o94ge/pogabezutazakeruto.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/tesivufuxapitekelok.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0301083a7---79325152507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=rf+tech+weather+station+688r06+manualPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15470 2872 bytes
SHA-256: 4b821b068861973d7f70dfd5551af6bfc43b3e5541ec859efb3ccf50864afe66
font_01_sfnt_off00015ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA7 5712 bytes
SHA-256: d9266e55b3fcd571172a9be543d81ce50c7e5274b3ca7b26561d7112bb56ffe4
font_02_sfnt_off00017205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17205 13772 bytes
SHA-256: 6ffebb575af85a6e21101b0a72eae709b761a0c832fdfba5ac2762f228a2af5e

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