Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c02fb323bd2630a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-23 10:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a104aad03d65550c26175c3e8e4ec05 SHA-1: dc9512d8676b99864a993db5a6c9cebb19a2895e SHA-256: 2c02fb323bd2630abb018cc001c4de61f21b4e312bd808b380ac5bab435bb9b3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are hosted on link farm domains and appear to be part of a SEO-driven scheme to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to download potentially unwanted or harmful applications.

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-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://xezojetit.ru/wix?keyword=asphalt+3+mod+apk+download
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/8578448.pdf
    • https://gifofelonapa.weebly.com/uploads/1/3/0/7/130775883/zegugujosuwew_damug.pdf
    • https://cdn.sqhk.co/nazabimon/iAjdiiw/truth_or_dare_questions_over_text_generator.pdf
    • http://gufutaca3.xyz/2012_toyota_highlander_service_bulletinsyp9wx.pdf
    • https://xonajababivoxo.weebly.com/uploads/1/3/4/0/134040492/8d6c286750ce9c.pdf
    • http://ita-bio.space/47726075350okljw.pdf
    • https://cdn.sqhk.co/pulovafafita/epOicid/truck_simulator_offroad_2_hack_apk.pdf
    • http://generalmassage.online/manual_gps_garmin_etrex_30rklx6.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • https://vegiranelikir.weebly.com/uploads/1/3/4/3/134399044/fupazi.pdf
    • https://cdn.sqhk.co/vofonowul/aBjfhjO/most_viewed_remixes_on_youtube.pdf
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/kesalosivam.pdf
    • http://myfirstsite.xyz/80662703871qyzob.pdf
    • https://zapedumukovig.weebly.com/uploads/1/3/0/7/130775012/4676666.pdf
    • https://renobulog.weebly.com/uploads/1/3/4/4/134464004/tokonagupi-kagiz-velulipego-wisik.pdf
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/sametudat-jonajujapara-sebifugaguwoj.pdf
    • https://bulejoge.weebly.com/uploads/1/3/0/7/130775594/411cf50948d70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufupu/52765759514.pdf
    • https://s3.amazonaws.com/rokuwapesu/acrobat_pro_update.pdf
    • https://s3.amazonaws.com/lebaxa/garmin_gpsmap_76csx_repair.pdf
    • https://uploads.strikinglycdn.com/files/9e86c83d-570a-45bc-8a70-6b786ed63414/pdp_xbox_one_controller_extra_button.pdf
    • https://uploads.strikinglycdn.com/files/2f3b593b-6374-46e2-b17f-13255b514734/sparknotes_midsummer_nights_dream_act_3_scene_2.pdf
    • https://s3.amazonaws.com/dudurat/niv_bible_study_download.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_off0000e1d3.bin
a731edc5771c156100c98f4aa3901f81f987d4fe7d4e98751999ee79f3dd19e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D3 5412 bytes
font_01_sfnt_off0000f424.bin
c3e2fc0fd59d0fa1b2df4ac23462aea25a322edaf6489d8737de83f2c2271f1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 15672 bytes

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