Malicious PDF — malware analysis report

Static analysis result for SHA-256 93681117aa730aae…

MALICIOUS

PDF

84.6 KB Created: 2021-03-20 17:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c3169c0d6adc852dfc6b7541e15cadf SHA-1: d71b7ff5f8562f7dc259909c1f8fc9e7741d757e SHA-256: 93681117aa730aaeb46bfdc172cc1466f28488f80358b903779ed88d32b5242d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing. One prominent URL, 'https://botokaw.ru/wix?keyword=wolf+hall+trilogy+pdf', suggests a lure related to a book title. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=wolf+hall+trilogy+pdf
    • http://italywow.info/mixer_yamaha_24_channel_mg24_14fxrhpc5.pdf
    • https://cdn.sqhk.co/ferobisuw/hhhkieF/blablavouchers._com_voucher_codes_and_deals.pdf
    • https://cdn.sqhk.co/xokebuzizo/Sic1Ygi/over_g_modern_air_combat_mod_apk.pdf
    • https://cdn.sqhk.co/bagekaketox/cjhaxqc/abecedario_ruso.pdf
    • https://cdn.sqhk.co/pafatewodoju/geAyicl/spa_weekend_deals_scotland.pdf
    • https://cdn.sqhk.co/gokarunedod/jbGhjW1/boots_baby_manual_breast_pump_instructions.pdf
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/xudaparerosuwaj.pdf
    • https://cdn.sqhk.co/tupuxinekowa/aXQgdxV/mutant_fighting_arena_game.pdf
    • https://cdn.sqhk.co/jogepirar/hianLji/nisodebexijitez.pdf
    • https://cdn-cms.f-static.net/uploads/4378856/normal_6015eef741c53.pdf
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5feaf186c93a0.pdf
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/d44b5.pdf
    • https://cdn.sqhk.co/toxotunem/gjhaJyf/45085936777.pdf
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5fdd403f58375.pdf
    • http://ig-about.net/60651071506ys4df.pdf
    • http://sellamorem.com/91552331154hwurw.pdf
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6018d75737cca.pdf
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5ffa20eb061e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2d6903c7-18ed-42e5-a2c8-25ae4d694122/how_to_trade_forex_with_100_dollars.pdf
    • https://uploads.strikinglycdn.com/files/682fe989-5eba-448e-ae39-1e5715d66247/wazed.pdf
    • https://uploads.strikinglycdn.com/files/9f765b6f-44c9-4e04-bc70-888c4ec7cb87/dezorinijisebozud.pdf
    • https://uploads.strikinglycdn.com/files/3b1dcc78-8e92-4686-8ae0-8a716220b6a2/kalaponiwelobojogeram.pdf
    • https://uploads.strikinglycdn.com/files/19eb9e1b-0300-42de-a39c-3bae78088239/vaporirujaf.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_off000100a2.bin
aaeab2f171ad577e9408b0c337541ad34898c1ca9719c425ef9815d9b9b02681
pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 4804 bytes
font_01_sfnt_off00011118.bin
e811f95f47351e0de2ebf627bad0e7aa366eaa041dfd8a1e462af7fe7f7303f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11118 11080 bytes
font_02_sfnt_off000136f6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x136F6 4324 bytes