Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea507c06265117a…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 02:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 40b150cbf8fdf145af3d16eb4deb24d4 SHA-1: 9642fc0fc1175eaae0580d5eb00187ca01ad1773 SHA-256: bea507c06265117ae0066abfd1894b4e6f443b40c1ef5779032731cebc83fab7
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with several pointing to suspicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm on disposable hosting, indicating a likely phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=active+transport+types+pdf PDF link annotation
    • http://tekcabinets.xyz/declarative_imperative_sentences_worksheets88bt1.pdfIn PDF document text
    • http://slamelina.website/34830739598oma38.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/a8hccij/shark_spotted_in_huntington_beach.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/31572848247.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/garepifagouq7.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/9hjidTb/vedivefukotexil.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/j74ifMk/50030735830.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/90081319395.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/2Mgcagj/smart_manager_for_samsung_j2.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/hfchcnP/alchemy_meaning_in_marathi_and_pronunciation.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
    • https://uploads.strikinglycdn.com/files/8d8c3f5d-143e-472c-89e2-d97ee9824ded/derecho_procesal_civil_federal_y_procesos_mercantiles.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/38782805839.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_22dac332d8b7459d8560abbc7d338e66.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_84bfd5c4ea3544ac90dab0824a6f5eb0.pdf?index=trueIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_fbf9171facd54592b6f2e0803a43e364.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/554b1fb4-a6c8-49b5-9494-3b0acebbda37/95706110338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79966c49-18ce-4ac0-852a-601d73c18f2b/57344773976.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/tipupopakabaretadizonezi.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_c7f2aa59e4964506bea2ceab3b65d27c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozetej/jolarujomugitovebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6987a0f1-3113-410b-9d83-3e6a223dbacf/dirabedozipuxukaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520384f7-5bbd-434b-81d8-2edca1e7689b/kuwer.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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 5056 bytes
SHA-256: 8ee61e496c0d7a3db7a7419e201b0e02d1cbc9bd5949d6bb048ce329fd43b6b8
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 10224 bytes
SHA-256: e1f24efee1ba65dd9febf4ffa46cb377c21604fac47f17eecd9261a4ac5ef4aa
font_02_sfnt_off00011de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3