Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c5ce76f77875df…

MALICIOUS

PDF

390.9 KB Created: 2021-03-25 10:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b2c8c098011ae948a499558dad19101e SHA-1: b0ee3d92c7cac287db3a2ce3a8d5fd2b0bac234b SHA-256: f7c5ce76f77875dfd3b57303c862fb296765a1505b3188eee86cdb8a82c383f7
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=dover+corporation+annual+report PDF link annotation
    • http://lomilinixigal.mypressonline.com/bedawibolijoguxuwipixamux.pdfIn PDF document text
    • http://maxapur.22web.org/litetamoxijetozowovizijo.pdfIn PDF document text
    • http://watertea.space/79225056399zitgj.pdfIn PDF document text
    • http://fbcopyright-center.com/nadurubusawowiwipovox4j.pdfIn PDF document text
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/6029365.pdfIn PDF document text
    • http://xabigaxen.22web.org/revosedobevodevefizezi.pdfIn PDF document text
    • http://cocobuka3.xyz/6375339846797q4c.pdfIn PDF document text
    • http://kobodesuwid.getenjoyment.net/miwasifexelafamed.pdfIn PDF document text
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/2864803.pdfIn PDF document text
    • http://toportt.online/95137446032fx2be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_688c1ecd1bc64280b67dad92705b8dd5.pdf?index=trueIn PDF document text
    • http://viwokapexonilef.rf.gd/50126417607.pdfIn PDF document text
    • http://fetapewifug.epizy.com/kakurenisisametet.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/bodybuilding_gym_program.pdfIn PDF document text
    • http://wenimawibi.epizy.com/yandex_browser_apkmonk.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/72954795535.pdfIn PDF document text
    • http://borobosen.rf.gd/online_merge_software.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_a574ad4099b54bda87e5d9f2956b7a2d.pdf?index=trueIn PDF document text
    • http://zogosugo.onlinewebshop.net/66718116872.pdfIn 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_off0005d45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45A 4808 bytes
SHA-256: 9e9e48134795b0d7030d7c5b89487098c072628cea9e2d230391df73800d3010
font_01_sfnt_off0005e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D4 12056 bytes
SHA-256: e6cab67fb97a844d09c7a41a237a05cd5755ae2816c7cff2896ada8e315aa7b6

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