Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bdf6f1f7fe1418…

MALICIOUS

PDF

79.8 KB Created: 2021-03-20 23:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa3ffeae9732a01d551b598904a0bd3 SHA-1: 770a1bb14295b1e9b9dc7cdc4a352916ae8d06a4 SHA-256: 40bdf6f1f7fe1418725a0194b22f66a276010f550e7e3c854720f2ee0a2bbacb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, detected by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of numerous external URIs, including those hosted on Weebly and other domains, indicates a likely attempt to distribute malicious content or engage in SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=attu+movie+songs++isaimini
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/f897dd38f8d4a.pdf
    • http://afterdealer.pro/in_the_heights_original_broadway_cast_full_showzge3d.pdf
    • http://universe1.space/balori_yorick_guideaup48.pdf
    • http://filmera.ru/how_to_factory_reset_galaxy_tab_3_without_passwordmjlef.pdf
    • http://ctuxuu.com/dodge_caliber_service_manual_downloa7x8sj.pdf
    • https://cdn.sqhk.co/pigajifaw/zAieTf7/tobeco_super_tank_gold_coils_uk.pdf
    • http://xeboxemovev.66ghz.com/ionic_half_equations_worksheet.pdf
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/3071574.pdf
    • https://vazejaxos.weebly.com/uploads/1/3/1/3/131382607/debajarafidigedag.pdf
    • http://vujumitadasedi.22web.org/wapking_bollywood_ringtone.pdf
    • https://cdn.sqhk.co/poxudanefisi/jaI3Lhh/osaka_amazing_pass_guidebook.pdf
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/voniwesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lodusebivepakef.epizy.com/71295723064.pdf
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_0eeedbd4495045cf813d93130f0f5e0a.pdf?index=true
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_05f283c1ee3e4cce98e6a5809dc42b5b.pdf?index=true
    • http://borarizi.epizy.com/firaxefagebusus.pdf
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_bfbe3a5ca0de446482dc0d2c709922a2.pdf?index=true
    • http://variwud.rf.gd/32729773765.pdf
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_4240d1c076c6483ca32a6e64727285d1.pdf?index=true
    • http://muvalinifotu.rf.gd/cervicalgia_tratamiento_fisioterapeutico.pdf
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_23a85f8431fe4c86ac76763bc22f34cd.pdf?index=true
    • 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_off0000f9db.bin
80c16c97111516f5f0b0038373b29cbe05b99d009036f3c7304c637b0cd264ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 4924 bytes
font_01_sfnt_off00010a95.bin
e0dc0eb09369b68ba181a512c83fc6b7dfa93a84ae420a7ccd044f562611d16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 11556 bytes

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