Malicious PDF — malware analysis report

Static analysis result for SHA-256 93118b097dd7598a…

MALICIOUS

PDF

126.0 KB Created: 2021-03-10 18:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 848d36b11003569d5a7b2b6e2db48584 SHA-1: 79f35a8e9bb0a77063190083c2dac90589bafedb SHA-256: 93118b097dd7598a2de925d4d41ac6b600ee6a75af300691a70e9a7f0b7da6ba
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The document body, though heavily obfuscated, contains metadata related to PDF creation and a keyword search term, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=asma+bronquial+tratamiento+pdf PDF link annotation
    • https://busiwilepajij.weebly.com/uploads/1/3/4/3/134353274/471963.pdfIn PDF document text
    • http://tusalolorow.22web.org/what_is_psychoanalysis_psychodynamic_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ibIyha8/zig_zag_zig_zag.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/gjfILLh/jonulekawukonu.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/depagikutojamode.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/1316700.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/2640367.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/6535369.pdfIn PDF document text
    • https://daxigowopijadek.weebly.com/uploads/1/3/0/8/130814785/e4229.pdfIn PDF document text
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/9203710.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/e2HAgiw/nafubunowug.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/instep_bike_trailer_folding_instructions.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/variburar.pdfIn PDF document text
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/3c8c6e84e427d02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagexukus.rf.gd/34649137096.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/gigifetumiluvaputes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9876971-21c2-4b40-9959-059f0cb5c070/zorewoxifewoviwupasuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232115ea-17dc-41cb-9199-4e6668a03768/rigawewarorufamisu.pdfIn PDF document text
    • http://kijemuf.epizy.com/jevusizaxoson.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/82747635816.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/parrot_bluetooth_play_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53aab91-85f6-4cb6-9a38-e78d3270696b/vitamix_5000_spare_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640a6f79-75dd-4df3-b9e4-f2105a3deb2e/9324463563.pdfIn PDF document text
    • http://nuruden.rf.gd/calligraphy_font_style_free.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_off0001b306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B306 5444 bytes
SHA-256: 9f3a6018dd5a9050293657c3b04a139c5135572fc21ac610a1fba67a0834fad2
font_01_sfnt_off0001c565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C565 10812 bytes
SHA-256: cdc4534aebda52c2232be292c612aa2a9d675c2c42fb62a923885c51cb3f9133

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