Malicious PDF — malware analysis report

Static analysis result for SHA-256 414de5a7b6de1204…

MALICIOUS

PDF

77.8 KB Created: 2021-06-09 18:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110fc41b9aa5e0d73927d87854c460b2 SHA-1: 7cb7878217d3df1799a095d5d9560cad189e01c0 SHA-256: 414de5a7b6de12046c2570997ad1689073e383a3a8c602073ffb783558b83d0f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to distribute malicious content or phish for information. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=energy+transformation+practice+answer+key', are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://pixomot.ru/uplcv?utm_term=energy+transformation+practice+answer+key
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f1f05e606---jadazokonunage.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/ea27ded0374a1fd3adf7a58e38eac814/lajavovowolev.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e5dc7e4f70ee514af6b53de6839079b1/82402382341.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c25de452fb---woxubapusipag.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160861ad7877b3---83187786261.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16083b14d1a7a5---remobesidavijiwetafunam.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/832ple4032d4r4vf919eum2gv4/92135131878.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831654e57f8---69641056356.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874a833c297---5853357496.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/f57rnbmta9et5gt00of42qrmg7/miranoboluwumogeje.pdf
    • https://stratasphere.online/userfiles/file/39334630009.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/kv06scaothulocracsequuifm3/lebakod.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2139e4a540---52881046886.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/stl7kjco936vu31ur4hbbdn8h2/35676131183.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a3dffa3aca14cc5cff040f7e2f6d47df/befalega.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/lljn4o62iubq6f6m5kp7uc2cqf/56328988017.pdf
    • http://calisnt.com/uploads/files/41737042682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e6fa.bin
cfceb79b99fde37b4bb3a684ecdefde401af786587d6b02ebf23121aa2f095fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5516 bytes
font_01_sfnt_off0000f9ce.bin
49603737ab36b63d1b0b34823ac032b324f2869e2ee46b2a6cca89c4ef32f6f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 2536 bytes
font_02_sfnt_off000104b1.bin
221465471032450972e01f6d80b2e4aa68f3e289be9dadf1af6ff3dc01e93f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 10844 bytes