Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bd4f80f8d1cd48…

MALICIOUS

PDF

69.3 KB Created: 2021-02-13 17:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 40b1d53b4416306cc7b7f7d0e67d6204 SHA-1: bc2354e9e11bfe2c66d958d892bafaa906114f04 SHA-256: 89bd4f80f8d1cd48bb7f47879f8af5015ac177d099831a4e15b60c0b9324c762
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=pell+city+board+of+education+phone+number In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fe02735b468d.pdfIn PDF document text
    • http://volamejabevakik.22web.org/audi_a5_cabriolet_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5fdbabc5954de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5fe006258ba9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fcaa6913cc32.pdfIn PDF document text
    • http://libralab.digital/vexikedaniwitifigotol8p2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390373/normal_60023610705ef.pdfIn PDF document text
    • http://wordsideget.top/carrom_board_java_game_128x160k6lz1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_601c7675d6f1b.pdfIn PDF document text
    • http://kvyovk.xyz/boxijewobo855q1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_6010fec137c3b.pdfIn PDF document text
    • http://interbank.link/cisco_packet_tracer_7.1_download_forfxzgz.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/jphfNjb/fukafisekape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fca406793ee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fda7290c9d0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5feceafcdc763.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_5fff3f04d9572.pdfIn PDF document text
    • http://zitokik.iblogger.org/naxinupaferirerewikobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafabumawo.rf.gd/sifuguzisonerupaveb.pdfIn PDF document text
    • http://gimobomir.epizy.com/aura_legend_apk_hack.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_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 5460 bytes
SHA-256: aad597e743b8456aaeb017b043a5ea647d02b8dccd205cd35e848cbc4fcaafa8
font_01_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 10464 bytes
SHA-256: f66e861c4ea3c7d336f29e2457f9cc39b678ab9ff03c90248e1ce6596a21b3a5

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