Malicious PDF — malware analysis report

Static analysis result for SHA-256 465272ffcfedd20a…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 01:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 294302cfbe4172b18b8aeac085ef665f SHA-1: 838fc2ac3816043c0283c2d5305a8b9a144565f4 SHA-256: 465272ffcfedd20a26afab16985c15b07e0fa1075ea1e5872c03a500fbbf72d3
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, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://ponafet.ru/award?keyword=2020+calendar+with+bengali+holidays+pdf, which is likely used to redirect the user to a malicious site or download further malware. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/award?keyword=2020+calendar+with+bengali+holidays+pdf
    • https://cdn.sqhk.co/gukokefa/j25Hgfj/drawer_track_parts.pdf
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/8193afbdfb0de74.pdf
    • http://vosojivaru.mypressonline.com/wekasugifamifos.pdf
    • https://cdn.sqhk.co/nimotixalulo/Mgd6cjf/juzopizovebowuwawajugi.pdf
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/fijif.pdf
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/tewutakiri.pdf
    • https://cdn.sqhk.co/nepelusir/eidPjij/lizunosow.pdf
    • https://cdn.sqhk.co/vimerokil/ijXwqha/wivugiwuv.pdf
    • https://fuwelobuzade.weebly.com/uploads/1/3/4/6/134649994/zisomilo_nulezodupu.pdf
    • http://bamefidev.mygamesonline.org/10717480669.pdf
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/2568017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_6755964856014dd3b2cd65c0caa3b2f7.pdf?index=true
    • http://xasejumav.onlinewebshop.net/bank_of_baroda_current_account_opening_form.pdf
    • https://uploads.strikinglycdn.com/files/9869315e-9181-44b5-aef6-380db71a0562/22891790030.pdf
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_11e789edda37447ba2d58cd7c2739b54.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1edc9c02-6e54-4729-a985-e4d79c173d76/myers_briggs_types_compatibility.pdf
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_2b24a1ba460d4fc0a55c52fb311e5693.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8a135a2b-b941-496e-be49-1e096652b964/tajweed_rules_of_the_quran_in_urdu.pdf
    • https://uploads.strikinglycdn.com/files/2a0721ea-2af7-4221-be73-e6a617090bf4/what_does_an_aviation_machinist_mate_do_in_the_navy.pdf
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_57a0e7f9a18e480286f517815a463d9b.pdf?index=true
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_b51cdde03d28475ba65c8e40568a6f3f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f346617d-9061-46c9-a555-9441bf043a56/rich_are_becoming_richer_and_poor_are_becoming_poorer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8c.bin
59d2f35b6267f49ac2cd16da159e4922e85faa3fc02f14a8f4d33c2245e4a917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5932 bytes
font_01_sfnt_off000103ba.bin
71c8e8a8e626379180ec2f0b867d7ababd5a180fd849c5281b528d42c8a8b37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 2292 bytes
font_02_sfnt_off00010e1b.bin
bb5ed3c124365abb7a951118497820a37a17a6a590b78b47ecd2a5950ac22804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1B 11532 bytes

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