Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c7a92792c2f2ba…

MALICIOUS

PDF

74.2 KB Created: 2021-03-20 17:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a9d225d2d60198ff7a32c0725e1ae7 SHA-1: 51d85304fb856c6a13ae095dfdf547e1f3cafb76 SHA-256: e6c7a92792c2f2ba73f0b7d4bb656ba9bc8aef3d99e14376c52295f2cfc9fd12
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to drive traffic to these external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=adulteration+in+sugar+pdf
    • http://krokoboko6.xyz/ableton_live_10_serial_number_generabm1yi.pdf
    • https://xasevezivim.weebly.com/uploads/1/3/5/3/135302984/9134807.pdf
    • http://quickpapp.online/passport_application_form_south_africathw3z.pdf
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/jusevigovefomuwotiz.pdf
    • http://muxufeguzugebu.iblogger.org/dagage.pdf
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/lasud-natekol-vegepaju-gafed.pdf
    • http://kisegojunu.22web.org/balochistan_issue.pdf
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/3b740b.pdf
    • http://olx-delivery.cc/ashrae_standard_62-1989k1527.pdf
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5ff7b7cd4a1a8.pdf
    • http://milansit.space/how_to_do_buffalo_wild_wingsotppp.pdf
    • https://vafevovelawa.weebly.com/uploads/1/3/1/4/131407112/f0c441fee478.pdf
    • https://cdn-cms.f-static.net/uploads/4391305/normal_603109316ae4d.pdf
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/9945981.pdf
    • https://cdn-cms.f-static.net/uploads/4478927/normal_602589433b292.pdf
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/zumeguke_vigewap_wenebonim_wogimod.pdf
    • http://xruhdfo.site/nefrologia_clinica_avendao_4ta2y0nu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/51ef320e-8311-4205-96a8-dd7e9c24fa37/33995113715.pdf
    • https://uploads.strikinglycdn.com/files/20b92182-ff62-4e50-a493-d321e61d0aa8/jowadotizozonuromutuvane.pdf
    • http://buvumitibeve.rf.gd/meiosis_webquest_answers_cells_alive.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e470.bin
2353b9b24c891a0903e415208d10b9e2f75ad2dbbfe01a6c0ca8e4d0879032ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 5200 bytes
font_01_sfnt_off0000f62e.bin
ee696d07ca0f500bb71eda81d4933e260851a4826e98f7bec2f94b392b846b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 10676 bytes

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