Malicious PDF — malware analysis report

Static analysis result for SHA-256 0897f649a33dfa5b…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 21:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06ace0e4c06b37cc37423f2b9df65667 SHA-1: f7014ff2692052590bde3bd8097ccb91348c2895 SHA-256: 0897f649a33dfa5ba813f15a67e48e1384e1e9b3b138df422010e2f9a53af0d9
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and services like striking.ly and weebly.com, characteristic of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

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 http://bilkaita.space/31970660954qfvyq.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366952/normal_5fc5ca8ddc535.pdfIn PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/480839.pdfIn PDF document text
    • https://latebutaweba.weebly.com/uploads/1/3/4/3/134315799/konutexi_zesakanu_zubojajof_mafumol.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/lagufuje_nikakipux.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/6b4de.pdfIn PDF document text
    • http://magozeveta.iblogger.org/marikimifemagufuxisutu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fefb8f428a93.pdfIn PDF document text
    • http://trelon.fun/what_is_the_proof_of_marriage_in_india96ttf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5ff96f968254e.pdfIn PDF document text
    • http://litekowogizono.iblogger.org/samsung_smart_remote_control_service_menu.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=how%20to%20remove%20bobbin%20case%20singerPDF link annotation
    • https://uploads.strikinglycdn.com/files/4169cfa0-306a-43ba-9e87-1ea104720fa2/knowledge_through_the_holy_spirit_of_promise.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/life_drawing_tips_and_tricks.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/57666301902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc543262-213c-4de5-a071-6fc9527165fd/99543214391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cce7c04-8d8d-4783-b143-642a97bb6b43/tavakonekiroke.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/44498480086.pdfIn PDF document text
    • http://xarujusezofa.epizy.com/how_to_wash_a_biddeford_electric_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d97df8-03cf-4f22-9865-8f596375ffd5/gidit.pdfIn PDF document text
    • http://pajimej.epizy.com/amortization_calculator_excel_sheet.pdfIn PDF document text
    • http://wadikapa.epizy.com/90022944714.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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5128 bytes
SHA-256: 6ada62a8d93ff565f8dfbd0d080c55f4b9256bf92384f314d00c5691af0b80b8
font_01_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 10424 bytes
SHA-256: e435591e755581894021b1fcf348a311f0294957de1f7cfecbb5682a03e141a2
font_02_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c