Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e040d41780360d…

MALICIOUS

PDF

66.9 KB Created: 2021-01-09 17:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 776840a09e7c99bc8278d79bf62582e1 SHA-1: 5a33340e3e23f858936ab40730f6885053f60ce8 SHA-256: b0e040d41780360de52ff1e8d85215b310f5c44f8397d0ee016511b419b7e18d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains a mass of external links, suggesting it is part of a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'NHS data flow mapping template'. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffset.ru/aws?utm_term=nhs+data+flow+mapping+template PDF link annotation
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/xemeweguv_tosixuz.pdfIn PDF document text
    • https://vesogotupu.weebly.com/uploads/1/3/4/7/134702950/zojorokupaji.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/86a7092679.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/2876658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5f9a088fc7274.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b0c9400e-1972-4f2b-badc-bd2d468a92ca/blue_ember_grill_ique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a97739-b833-4db1-9c77-bd2173321b9f/xodesorezupokagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4a5a29-f82a-4f9a-bd17-b5ccae34e448/vefogepenikenalomuxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d31349-bedf-4ebc-91dc-31eb9ca2d08a/jurassic_world_the_game_hack_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84dfa7d-aa84-4a35-afa4-ca575f1356b5/6_simple_machines_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b41791-1d1b-4e25-8429-20be2a53a43e/7245762764.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD6 5208 bytes
SHA-256: 14d8547866dd795d7f87bc2d37a3e13840da93e63b02bbae702d8d76514f88a1
font_01_sfnt_off0000cc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC85 10200 bytes
SHA-256: 2802e78c44f8417812eaba1c80f7f7a44afeedd18b5b4c23144914661a63e569
font_02_sfnt_off0000ef7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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