Malicious PDF — malware analysis report

Static analysis result for SHA-256 da346656bf43773e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 04:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5f7bdb8794277c3642927fc4b761df6 SHA-1: f7dd205aa51751e0b5e8b34f5858dfbd0611398e SHA-256: da346656bf43773eba0c94bef14b16048bfb298c9b147d13a62e436b20d09864
216 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on Weebly and appear to be part of a link farm or SEO manipulation scheme. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to phish for sensitive information. The presence of embedded URLs and the ClamAV detection suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://crophysi.ru/strik?utm_term=we+can%2527t+stop+we+won%2527t+stop+miley+cyrus+lyrics
    • https://lojodisomu.weebly.com/uploads/1/3/4/0/134042672/f128cd5fdfd6071.pdf
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/04b7572fa.pdf
    • https://cdn-cms.f-static.net/uploads/4377704/normal_602a2a1d149f6.pdf
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/nujigaxipelubuz_videvefafibiva_tefubolenu.pdf
    • https://definifizuzum.weebly.com/uploads/1/3/4/7/134759181/dojufit.pdf
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/fulerawimujat_natize.pdf
    • http://usesalon.xyz/zobobafokizixuwolsoe92.pdf
    • https://xevosafodom.weebly.com/uploads/1/3/4/7/134739965/mebanug-fereturu-livevunube.pdf
    • http://delifeschool.com/controle_maths_5eme_proportionnalit89z4r.pdf
    • https://wumetitazidizo.weebly.com/uploads/1/3/4/8/134885052/7005230.pdf
    • https://cdn-cms.f-static.net/uploads/4376852/normal_600ebd072042a.pdf
    • https://cdn.sqhk.co/sileluzorupo/sOjaXN6/rightmark_audio_analyzer_6._2._3_free_download.pdf
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/bobogaxoze.pdf
    • https://cdn.sqhk.co/pirujezexod/gjalhha/farmville_2_country_escape_unlimited_keys_cheat_engine.pdf
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/fopuxaxavoli.pdf
    • http://spainwow.pro/84141224137zu5z9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89989e08-3fab-4d5e-9b7d-b6a77e3e83fa/are_hampton_bay_fans_good.pdf
    • https://uploads.strikinglycdn.com/files/4f08cf35-5205-4ffe-aa4f-9afc34ad62c2/ryobi_leaf_blower_40v_review.pdf
    • https://uploads.strikinglycdn.com/files/7f3b2fff-d5de-495e-9a1e-63789d091472/que_es_un_escritorio_remoto.pdf
    • https://uploads.strikinglycdn.com/files/d128691e-d3b5-4485-b111-420231e7b5a2/frigidaire_fad704dwd_energy_star_70-pint_ontvochtiger.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_off0000e27d.bin
8d2e9ed56799908c0a965ea52286780ce0027960b25edc7a08d49cf3345c5720		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 5320 bytes
font_01_sfnt_off0000f4a4.bin
579a58ca0653592b54433940e8229f2c7680e30f895296626b8091368e62ab35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 10388 bytes

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