Malicious PDF — malware analysis report

Static analysis result for SHA-256 4970128e425c0a5d…

MALICIOUS

PDF

77.9 KB Created: 2021-06-09 20:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7b5f0ecca078df7c2bb950a937619c74 SHA-1: c33c1e0849b7159c196b2b232f245f7bcf9a45ee SHA-256: 4970128e425c0a5d5500d2627a9626ae58b0a3949bd36e13fc368656d4e0d5af
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, containing multiple links to compromised websites and disposable hosting. The document body, though truncated and obfuscated, suggests a lure related to 'six pack abs workout routine pdf'. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=six+pack+abs+workout+routine+pdf PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfca56fa68---joralakujipo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/040c63965d46d47fd5a29e0160b840b3/kovajajetimoroxiz.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/dcf54479d15b5a6ae33c661f9cb08fd9/23296141203.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/12501179493.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/c4ee52cc91cea664a859b7549bafc9ff/mulubajadabatu.pdfIn PDF document text
    • https://blokhol.com/upload/files/50272110202.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4626071dcb---70358256435.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210513003507247370634.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/fisara.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3b776fdf217d6c809ceb1d3f40e52d77/7139943582.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/tiwuxowamozu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/34790bd54f690eafbfaddb505d90431f/29521316958.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/fdf417054e9f25343eaaeb13ae2b2dc1/387861644.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//wefivajebumodemevijov.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/medamidokiduwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 5584 bytes
SHA-256: 9be7a1ce3e09e4c61f15a37e7694974a721b657f6f287a672082bf7af1489737
font_01_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 11028 bytes
SHA-256: d1f3ac752465bb5625d20db48c16ff6a5fa787ce899cebac8be60ab6819a666c

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