Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1cd0b76417dfd5…

MALICIOUS

PDF

99.7 KB Created: 2021-07-13 11:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1609b78e1303bf063868548d89a89364 SHA-1: b179ca4a31e2a9f4d343bac20eae25d237fc4d97 SHA-256: aa1cd0b76417dfd5e45dc9511c77689a0080a157384347160343da2061639f9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

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 https://irlanc.ru/uplcv?utm_term=watch+football+online+live+stream+free PDF link annotation
    • http://beautybybelief.com/admin/images/file/fomumufel.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9f7cd3d3c96cdd5cc95c6c76b57ae357/nujolawiwewikuresusizegal.pdfIn PDF document text
    • http://e-hematologica.com/users//file/vagofuroti.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe7d8f905---dikar.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/nidetikekososujimiwig.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/vafefawixenosi.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/3uv46ieavg8sj0bh6369s1p1se/46633606279.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5a81ae7c---6378720004.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/90110440194.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160891d2e15674---97659942894.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/59092343279.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3d93feee---12480959534.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/xagusejuzuxudames.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mr0ku8l0s2vp1nq2mi7u2q9jk1/dekufevurubojula.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/077b3105ac6fb7d36213c47699236fa2/45741208590.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/14731dd9664ae7f0b069a90c6f65db81/nabukuj.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c3040b7119dc7edacefcf09f8b6cf577/darikikovifexikax.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e0fca94da---tugofarilareja.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/dozozotinokazix.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/v3fspr4jf1korjb6vrksa8018l/76034518294.pdfIn PDF document text
    • 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_off000122ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CA 17532 bytes
SHA-256: e0137f34874c83dbe80e42292d8cfd9aba9e34ebd359cd1f890108d3a633c78d
font_01_sfnt_off000150da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DA 10800 bytes
SHA-256: 941ea6a3b8518fca15cbd31f81260f6d8140d6fce81698bc89537205a2cf7312
font_02_sfnt_off0001699f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1699F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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