Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e3286006b202cf…

MALICIOUS

PDF

78.6 KB Created: 2021-06-13 18:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67c669ea2ff87cc4565b2fd4e3c457a SHA-1: 43f7f426e74cc03b34a03ed054c1df403d09bba8 SHA-256: a2e3286006b202cf4dfd61cb99f80b3b315827901969cf1f1d727abb5b0eb086
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/uplcv?utm_term=nd+bhatt+engineering+drawing+solutions+pdf+download
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/majuxuvimifow.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8e025d8d0---98219890308.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081849dac0d2---xasaxeliwiwupogukidi.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/d51oqo9vjm6884ovbm98erll7n/30192444681.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/3cc540b7e0118bff1718fc5d4c08112d/28782123466.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/60efe3d871ce6c5f96d69faaaf7fdcaf/31065389340.pdf
    • http://albino-pitti.com/pub_img/file/nebivejojisitemizopuwu.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ic9uvniqc6tc1pv0bhrsi94790/80262913097.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3fd93321---59230512514.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4a6c9ecb7---97708757138.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cad14e673---riserifofotobikij.pdf
    • http://boekenwinkelindex.nl/images/uploads/pixulifepeti.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c535b4fbb8---nujurutusen.pdf
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/rafofifiwo.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/cfeb761e3dd052de376a1944cd865c47/49064416148.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607630e1197db---3461062284.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72a.bin
af3a5130cde6da432356d3cb3df35b2fe69a71d2b5e175b7619c7393cd97ec1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 5504 bytes
font_01_sfnt_off0000f9f0.bin
72782028793b7b5c8857b969693935cc3b951be493b18bbaf25e41e567f1bd5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10656 bytes
font_02_sfnt_off00011e7f.bin
cf221926fd5b12240768df29560db49794323e6b501843f05e7c02f32a77f46e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 3632 bytes