Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b047bf588b4e0a…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 02:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3683bb21a40c785757d72cc969ae166e SHA-1: 1dd9dff4977e7c5a67e553c83a298a2885b07bd7 SHA-256: 79b047bf588b4e0acb21b572c56b167da4fd21f2a019f5005aaf25aca3fa8cc5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded URLs point to various domains, many hosted on weebly.com, and are likely used to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=statistical+data+mining+pdf
    • https://wimukesogizat.weebly.com/uploads/1/3/4/6/134639197/7945756.pdf
    • https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/3594985.pdf
    • https://cdn.sqhk.co/xugiwatokax/giChijh/anniyan_tamil_full_movie_online.pdf
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/9206405.pdf
    • https://zuwiliwiwira.weebly.com/uploads/1/3/1/0/131071082/9c8dfe8.pdf
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/b180ea1a04.pdf
    • http://felagem.getenjoyment.net/lerexolewupasujeta.pdf
    • https://posukezeke.weebly.com/uploads/1/3/4/7/134746748/ridewo_gosoku_tajajofibojenit_jogijuwapijenon.pdf
    • http://dapajurop.mygamesonline.org/ielts_writing_marking_criteria.pdf
    • https://cdn.sqhk.co/wifukatar/2jiyjiy/xikovixadesulunona.pdf
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/dosene.pdf
    • https://cdn.sqhk.co/figesuweno/mlQgd6A/trench_definition_world_geography.pdf
    • http://bamefidev.mygamesonline.org/jogemodedunuratu.pdf
    • http://lololoj.sportsontheweb.net/que_es_el_capitalismo.pdf
    • https://lowixuwegula.weebly.com/uploads/1/3/0/7/130775587/b7366.pdf
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/4736635.pdf
    • https://tonezukem.weebly.com/uploads/1/3/5/3/135348251/8a47b.pdf
    • https://cdn.sqhk.co/palugalanivo/eJfjggf/weidmuller_8_port_ethernet_switch_datasheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rujimidujek/zedam.pdf
    • https://s3.amazonaws.com/gozifep/how_many_calories_in_a_bojangles_country_ham_biscuit.pdf
    • https://s3.amazonaws.com/kodipopujufipig/40433186686.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_off0001051c.bin
28a509a3cb85b57d837a544450cd410b0484fa0d55808a04678d970c7775d01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 5480 bytes
font_01_sfnt_off000117b5.bin
c6ac7b5da5e19af1e42c89a45839cf1f4cab324c2045690528de59ca00634cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 10900 bytes

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