Malicious PDF — malware analysis report

Static analysis result for SHA-256 9810ba0c5b489956…

MALICIOUS

PDF

57.9 KB Created: 2020-10-29 02:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f117c30dc0fd19d4ea6bdd4d3125f5de SHA-1: 719c01db2894b0e821f772040a6fea00880335e4 SHA-256: 9810ba0c5b4899562f19bc6addcf24d81606e625e6770ba8e73cff1afb62ef36
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the PDF's primary purpose is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=ultimate+pull+up+program+pdf In PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/d2604dc41.pdfIn PDF document text
    • https://sukuvigu.weebly.com/uploads/1/3/4/2/134236057/2735202.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/powagavavagu-tokaw-toderexagabexer-fagopuxatobatu.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/badeniwetu.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5449688.pdfIn PDF document text
    • https://vepaxanejabag.weebly.com/uploads/1/3/4/3/134317352/d1ce87e7f2.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/zowafarifojij-zoluxit-mutewura-gofetubavez.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/397b48ab74.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/0cd0611.pdfIn PDF document text
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/9be1ccb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/attitudinal_barriers_in_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/35569819834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9766/0835/files/proton_preve_manual_gearbox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7084/3797/files/16244599426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/doditugebo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/56343578105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9388/3557/files/lajivokege.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/mibuxenezakosofaduri.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/august_monthly_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6200/1301/files/56822559818.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/celtics_vs_bucks_season_series.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/86864316353.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_off0000a2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A0 5176 bytes
SHA-256: 0b4777abb784edfd72fad4056ba9626741d6a83172046aa98d47c895e7986ab6
font_01_sfnt_off0000b425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 11128 bytes
SHA-256: 2c3c4901e179bc116eecb5a4953951fd5e0ad50b3ec3b2064f8fb912eef0c0dd

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