Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dce968f140a6d4…

MALICIOUS

PDF

68.9 KB Created: 2021-03-24 05:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d973ece8de7c91e402b7092ebdd069c SHA-1: 7bba4c2a5a2efe385931dde49e35151d5e52ab51 SHA-256: 52dce968f140a6d478112cf24722ef39f3e34b8e211d560c8bf0b2f64121586b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, 'lozipotod.ru'. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'metals worksheet ks3', likely intended to trick users into visiting the external URL for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://lozipotod.ru/wix?keyword=metals+worksheet+ks3
    • https://cdn-cms.f-static.net/uploads/4427811/normal_60378fa83dfb7.pdf
    • http://tovelksa.website/7255978187441i9p.pdf
    • http://myfoxing.online/88004523953iftox.pdf
    • https://cdn.sqhk.co/kominepoli/0yjgqjb/nyc_311_parking_tickets.pdf
    • https://static.s123-cdn-static.com/uploads/4385417/normal_5ff3b598ece54.pdf
    • http://mebets.xyz/10758385103fmrj5.pdf
    • https://static.s123-cdn-static.com/uploads/4375355/normal_5fee2a04dfd98.pdf
    • http://begemot.space/21792805150u5zn8.pdf
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fe48277e6519.pdf
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fce896715d68.pdf
    • https://cdn-cms.f-static.net/uploads/4483354/normal_604d9f500323b.pdf
    • https://cdn-cms.f-static.net/uploads/4454164/normal_601b4a4e939f1.pdf
    • https://cdn.sqhk.co/numiwuzuwix/j8hd66x/luna_storia_three_kingdoms.pdf
    • http://doucheop.xyz/25238391384bqw8.pdf
    • https://cdn-cms.f-static.net/uploads/4480397/normal_5fdc72412e0e9.pdf
    • https://cdn.sqhk.co/mibemofega/Yheyhbo/pubogomufugijiboxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fokapikow/41781717872.pdf
    • https://s3.amazonaws.com/rejiner/parapolazipe.pdf
    • https://s3.amazonaws.com/zetituri/58096282690.pdf
    • https://s3.amazonaws.com/bulujono/14382232985.pdf
    • https://s3.amazonaws.com/bokexizometun/vidasajop.pdf
    • https://s3.amazonaws.com/vetamedisoz/87438445556.pdf
    • https://s3.amazonaws.com/benuka/cassava_flour_nutrition_information.pdf
    • https://s3.amazonaws.com/piradi/english_story_book_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cec1.bin
75ba24016f5d8b84e9f94268ad7a08b4ac2f247514d85af86ac3c99594f31ec7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 5100 bytes
font_01_sfnt_off0000e031.bin
e1fa5b205dec9b018380d45c49c20737289dfcbe80f95f6b3f04c208621a7aa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 10676 bytes