Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab0cc30e8963d1c…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 04:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0d7dd537fc4ab1d0c88e2ed8fbd524 SHA-1: 1507d3853d3cf5355a04fa1ba621268ac8af4b47 SHA-256: 5ab0cc30e8963d1c0d6652d0dca8c85a911586bade05ce0558aa4e4098469d19
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious document designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=brandsmart+tv+antenna
    • http://waralolojogeta.sportsontheweb.net/46429776201.pdf
    • http://savineme.mywebcommunity.org/ziweridipitesajupuki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7fd4abad-31f8-4c52-ae8e-93d0cc7f2af2.filesusr.com/ugd/910e70_d5e111b99c7f4fb2891a5fae012f1e26.pdf?index=true
    • http://xenezipulugiji.atwebpages.com/austin_kleon_books_free_download.pdf
    • https://uploads.strikinglycdn.com/files/aa32fd99-a6de-4e7a-bf27-d0ae925c0808/who_has_folding_chairs_on_sale.pdf
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_4ca85ea3fdb7434187d7601675160550.pdf?index=true
    • http://jezevenakos.myartsonline.com/what_month_to_plant_tomato_seeds.pdf
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_94ce4961c1e9455c8b50e00ff60516b2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0bb99ae7-c48e-4de5-b235-2bdbc00b441f/75171477234.pdf
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_5174000f3c1842bd883ef9c7ccc5a68d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dda7d672-0c71-4533-bc38-842ad7f8132a/how_to_connect_logitech_keyboard_without_unifying_receiver.pdf
    • https://uploads.strikinglycdn.com/files/18768727-0686-49a2-805f-89d73429615b/goxemovikelan.pdf
    • https://uploads.strikinglycdn.com/files/b811907d-f831-4728-bf78-db789eddfa66/19942514166.pdf
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_4476cb5946254069ad8d58c6105fe8a0.pdf?index=true
    • http://pisobak.epizy.com/xetuvokegukoramil.pdf
    • http://xuwexabunes.rf.gd/askep_atresia_ani_pada_anak.pdf
    • https://uploads.strikinglycdn.com/files/c1542c11-e71a-4874-90ed-96563f5a89b3/51941369113.pdf
    • https://uploads.strikinglycdn.com/files/e4745d10-1dcc-4ff4-b71b-37f97875e31c/12197722586.pdf
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_4d56ff92853b483d848593358fb3b308.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_off0000fb3c.bin
1e0e4388f0e5f0de80c67f53f56af5afb25be5dab2658c3b0e28bab646125f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 5048 bytes
font_01_sfnt_off00010c57.bin
6ad476cca4a3fa12fcf40f0beffc4c2eadd57703bb128764ad756b3fc6f27af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C57 10880 bytes

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