Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8517a01a22bbc6…

MALICIOUS

PDF

90.0 KB Created: 2021-03-28 17:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f8855531b302e418a700fe1e85495dd SHA-1: 9e78cbcb908734d8720e5d8a949bf863fa8b582a SHA-256: 7a8517a01a22bbc6b2a560d0aa1c34f736259a19a90dbe3dc78cd93b5bddd8cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=how+can+the+law+of+gravity+be+overcome PDF link annotation
    • http://fafesixokegigi.getenjoyment.net/krk_rokit_5_g4_pair_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_6037d99b90aa2.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/5940377.pdfIn PDF document text
    • http://gesakif.iblogger.org/luzukizuge.pdfIn PDF document text
    • http://reduslim-ufficiale.website/csr_4.0_bluetooth_driver_downloadye575.pdfIn PDF document text
    • http://kigurumi.org/odisha_aso_exam_booksr62sp.pdfIn PDF document text
    • http://nunokulivot.22web.org/77414226285.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/wevoritegibarevafarun.pdfIn PDF document text
    • http://dorightunion.com/arrondir_dans_une_formule_excellsmx1.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/roadmaster_24_inch_granite_peak_mountain_bike.pdfIn PDF document text
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/7142429.pdfIn PDF document text
    • http://rukawagamijo.iblogger.org/tuvozewanok.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/can_i_see_a_live_satellite_image_of_my_houseqacu8.pdfIn PDF document text
    • http://xasekijig.mypressonline.com/89868167408.pdfIn PDF document text
    • http://vkysnaya-eda.site/death_note_live_action_ryuk80pp6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_60221c0d201b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_5fdb53fad0660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2361748-5a26-481f-ba5f-32330a1498c8/what_is_the_second_step_in_the_pre-production_stage_in_filming.pdfIn PDF document text
    • http://moxilapavaz.rf.gd/mivabiwegevijomemanuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d405922-5710-4548-8d40-c62ff3fb3bfe/linogirumebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2747b19a-64bd-4a5d-9b83-597fa76e1e4f/2005_ford_f350_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a37cf7e-13dc-4ca2-8520-f7c565399e60/73010553358.pdfIn PDF document text
    • http://zixufiwama.rf.gd/22372079782.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 5472 bytes
SHA-256: 67498658c4ab8f3b271aac1af962c191478b284874d5e4bf50d00302e8d319b4
font_01_sfnt_off00013001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13001 12108 bytes
SHA-256: 0c37e103229a479c5bc69735e432bf2ac4a57f66ac45241e7414d996e67e8798

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