Malicious PDF — malware analysis report

Static analysis result for SHA-256 079258c399062189…

MALICIOUS

PDF

81.3 KB Created: 2021-03-15 04:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d95060b42a5da1396ef646791791baea SHA-1: 13c2d75cddd81c1115d0e0c0956fea9fcb9f2059 SHA-256: 079258c3990621893971dc3a4ba254544837973a2778643a58effde325ed170c
126 Risk Score

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 0.9996

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://vilenefex.ru/123?utm_term=primary+colors+of+light+worksheet PDF link annotation
    • http://zesijesagevonot.22web.org/format_of_one_column_cash_book.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/how_much_does_it_cost_per_day_to_run_a_dehumidifier.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/air_france_447_final_accident_report.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/medication_adherence_report_scale_mars_5.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ie79W37/epic_seven_luna_fanart.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/HqgfjiT/griswold_cast_iron_griddle.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/Hhi2ggz/as_video_status_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/bWnieii/football_manager_2020_mobile_players_to_buy.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/how_to_test_a_hayward_salt_cell.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/kieVjc3/vosipetulijar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_11c1326c04534206b441d5da8d69a75a.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_4fe659aa60a241839f84775aecf9e460.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0a3e6b-f33e-48ff-b882-1a4b5f97e5f3/sense_and_sensibility_2008_soundtrack_martin_phipps.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_4027301e40964e358fabb98d7f424716.pdf?index=trueIn PDF document text
    • http://tetexabe.epizy.com/kicker_8_inch_hideaway_reviews.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_0735882da7ff46888059ad1f4a1cbaa2.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_136d3611cb23494ebad3974cff2acfc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bba5f97-a565-4405-8c94-c003bec8155c/rijikiwejefogugoren.pdfIn PDF document text
    • http://dezologukow.rf.gd/download_aadhar_card_without_otp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56fe4c2-66f3-414e-b587-eea62e7a6cc4/dlink_dir-601_install.pdfIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_73bee2706f7f46038c042302bd59dea7.pdf?index=trueIn PDF document text
    • http://rixavadalut.rf.gd/96716833791.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_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 5556 bytes
SHA-256: 3a976f09dff12789e73d22f0a427cce7d15703147d80bfc5f1a9443970903bb2
font_01_sfnt_off0001131f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131F 10684 bytes
SHA-256: 5b87c11e2f7a549e8541e9419945e84e265ba967641b2bd7b7d8edcb1b75a5ff