Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dc00b4cc99e179…

MALICIOUS

PDF

79.4 KB Created: 2021-06-14 14:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 244241cf15dca0e6a95654413b4b3545 SHA-1: 33cde6e36e34f1aa7e3681f982b7977eef4c4354 SHA-256: 30dc00b4cc99e179f1a02e912f82d60219da6767d3bbfaecc371c1337a7cc7ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which appear to be compromised WordPress installations, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the links indicate an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

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://laborke.ru/uplcv?utm_term=download+film+ashfall+sub+indo PDF link annotation
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a2943732c---vupojov.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a70e656e6b---74870142688.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160796fa7ad353---10087761695.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210506224541205661718.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/addng5isfm067ql43gfeksa1u6/59043666276.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/dededaxapupar.pdfIn PDF document text
    • https://maturana.cl/upload/file/2044437547.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8fced20317edba2a1f403e189c0b1562/67815350344.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/57a885d30fffb2e337cc9190083175ae/fubajomapajomitevu.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/70412326793.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca841d8c10---61630197447.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/cd51525da2614fd252efec169cfe070c/36413148651.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/655e103571a91140253d17a4266d31d6/sorarufijedomujup.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/wesokobus.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/nixukurimoferuvefurur.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/19b35e1bcb7815ed09442cc71888afb9/300746575.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/rinowoso.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/8cbb681b4f970bb11b6f6a9df91f8d97/bijijoruwelera.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/73168015824.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b028db6e3---rowapivowozidan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 3140 bytes
SHA-256: 93c1ba12329be4396c74c9ff23fb47a348e73718919f8ec4cf8dab3158d3b604
font_01_sfnt_off0000f995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 5280 bytes
SHA-256: c0185e21f3580650b3b722f60f0ba897b201cbc6676e3ad460dda73ee346bfbb
font_02_sfnt_off00010b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 10708 bytes
SHA-256: abfee6411c5f7519ecb196d2bcd8ac49085a646208e0e50a72fc46ac84c0e7ed

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