Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb95eeb903f18ad…

MALICIOUS

PDF

76.2 KB Created: 2021-04-01 15:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 448750c5cfcef6cda0007bd13b00635f SHA-1: 5901f3aaaa6722236a8315adbff1a351ed2531fa SHA-256: 1fb95eeb903f18ad3cea2477afc36050d3de701818bae2f1c3fb02b088b0c8e7
186 Risk Score

Malware Insights

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

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 0.9995

Heuristics 6

  • 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.
  • 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://golowaki.ru/aws?utm_term=how+to+clean+vicks+starry+night+humidifier+filter PDF link annotation
    • http://sutiboju.sportsontheweb.net/dudivaseziliz.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/raninavu.pdfIn PDF document text
    • http://creamwalls.space/how_long_does_it_take_to_recover_from_betrayal_trauma5p9ld.pdfIn PDF document text
    • http://pressit.space/dd_5e_magic_items_list3digg.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/jgjdjcM/bowles_construction_reform.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/XOjficC/42933461070.pdfIn PDF document text
    • http://all-casino.xyz/52096633631jvrj6.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/57610771348.pdfIn PDF document text
    • http://vexizudu.medianewsonline.com/ielts_band_9_vocabulary_list.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/lazotarusixaga_rarodat.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/stephen_berndt_alois_irlmaier.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/sefoxexu.pdfIn PDF document text
    • http://biomaniks.website/fapugirt503p.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/java_swing_gui_programming.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_1c71d9cf4bca4791a3c2074920017868.pdf?index=trueIn PDF document text
    • http://pamajaxa.epizy.com/laudate_dominum_solo_sheet_music.pdfIn PDF document text
    • http://deroselewem.epizy.com/codeigniter_email_template_library.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_568e3ad6f0bf4e69819a52f7f60ed468.pdf?index=trueIn PDF document text
    • http://wazezijipesu.rf.gd/49885945661.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_bfbf8c2da45f48a99171ff34b2b1323c.pdf?index=trueIn PDF document text
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_9f01ac99bf0b4f8783e1b78d2724a361.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_07d9ef2e37e7495ca3ccbba6ced33003.pdf?index=trueIn 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_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5716 bytes
SHA-256: d696f750c5ea0f7e5b2df8b049196d9eb545cec569127c183659c35de03e7a49
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 10636 bytes
SHA-256: 1806f1112c47ebd5b81f60bd4735088839fe5576a78e5b7244a42f87265ccf6b

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