Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8de497650ff1524…

MALICIOUS

PDF

77.0 KB Created: 2021-03-04 23:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 11c5115deecad5869a3dd553e5d0ca4c SHA-1: f5967d7dae966a669d50a8c779e659e75a836a02 SHA-256: c8de497650ff1524e2bba63ce877ffa69576d529ba7489191e26ca2ea0e29dcb
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to disposable hosting domains and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/aws?utm_term=the+soul+of+a+new+machine+review PDF link annotation
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/4526315.pdfIn PDF document text
    • https://wutusubefesuw.weebly.com/uploads/1/3/5/9/135961291/jabebupepake_makipevagagan_dekebo_tozefinakoki.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/sigozibiwapuda-fazopalotib-sefutu.pdfIn PDF document text
    • https://kalujobad.weebly.com/uploads/1/3/4/3/134390175/zobemeruxazupomom.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/kdjeDxL/52442066639.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ha0CFuX/pumpkin_carving_kit_target_australia.pdfIn PDF document text
    • http://covidcapsule.world/wepifumejuxatiuhoze.pdfIn PDF document text
    • http://begemot.space/vefapexamilewajuvujaxbqg5.pdfIn PDF document text
    • http://zahlungsservice-ch.site/wedding_cake_baking_gamesk9q8q.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/phbBieh/nokexolepekuwuzedaludolof.pdfIn PDF document text
    • http://milanomoda-italy.website/laboratory_manual_and_workbook_for_ba5axv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b092f4-fe0a-41bf-9d27-02990a81341b/resumen_por_capitulos_el_amor_en_tiempos_del_colera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79831d9-df74-46f5-88e0-67886c9f8d40/are_we_equal_before_the_law.pdfIn PDF document text
    • http://wobetaledofekur.rf.gd/medical_laboratory_equipment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e7676a-9ac7-470f-9126-107eaf799f6f/73379195449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ef6acd-64b9-45f7-adb8-86946b168d06/75058778857.pdfIn PDF document text
    • http://vapedefomagejev.epizy.com/directv_remote_programming_guide.pdfIn PDF document text
    • http://sebipukavore.epizy.com/27415228923.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/80834211270.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/vuneno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a837c1-8319-4095-bbf4-2d123b6bd657/is_it_possible_to_learn_python_in_a_week.pdfIn PDF document text
    • http://diverozisutujew.epizy.com/94652365360.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/partnership_contract_sample.pdfIn PDF document text
    • http://bogizun.epizy.com/bushido_blade_2_psx.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5224 bytes
SHA-256: 7d275ba19d6e08d4caba9ffafbc33030535286dd2f7e4da1c8d3b55e8fba1a42
font_01_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 10464 bytes
SHA-256: bb7ff62e23d9c14e38075aa526a84a30a9df7e153b9a66db98f428a2cc81a77d

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