Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09b115204678fd7…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 02:08:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4342165bc7d667392569a25de50b507d SHA-1: 9fdff5069762399a4c28fffd0bf6e7a6a5c41804 SHA-256: a09b115204678fd78f5dabdcf176d3b96fc7c15d01cfec4376dbfdb97938610b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded external links, with one pointing to a URL associated with a 'warship battle joycity mod apk' keyword, suggesting a lure for potentially unwanted or malicious software. The presence of numerous links also indicates potential SEO manipulation or a link farm, a common tactic for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=warship+battle+joycity+mod+apk PDF link annotation
    • http://ketrovk.xyz/msp_hack_generator_no_human_verificaywkrp.pdfIn PDF document text
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/wepalaxuvov.pdfIn PDF document text
    • https://cdn.sqhk.co/wevavagu/iebYzRu/43881794376.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/oqgcFmZ/risoson.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/4TjggeL/66928612625.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/ehhMHEp/wyvern_gem_farm_mhw.pdfIn PDF document text
    • http://fionainthefield.org/lifomorawiso7sc6c.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hdghjau/nomatuguzasu.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/wivurijeforika-zutelabadosasu-pitugozapodu-bokexelotape.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://s3.amazonaws.com/vonutavekip/luxaxuriwasazewilinanu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/barclays_myzone_app.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/nedeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/75630594788.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/30168182926.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/wound_infection_antibiotic_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/congenital_syphilis_guidelines_cdc.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/ib_business_management_guide.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_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 5392 bytes
SHA-256: b01b324e8c66e3708e141c9d7f651d3998ce27e825b14dc467a95bf454a86bd6
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 11012 bytes
SHA-256: a048336cc75e1b99ebec66c7cbf75129b5b2fe43151afc18cb7928a883ecbcd2
font_02_sfnt_off0001150d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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