Malicious PDF — malware analysis report

Static analysis result for SHA-256 c703062d126c8ac8…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 10:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9dde8a458249c2cb5a0f2b5775a1fbe8 SHA-1: 38126916342faea0f5818636220a1b835e70a908 SHA-256: c703062d126c8ac801e6e330d989285b854a24dd500a839596244afc5642a98a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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://druttle.ru/award?keyword=behavioral+finance+biases+pdf PDF link annotation
    • https://cdn.sqhk.co/mitejapeki/FH99Wih/99925559040.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/05qhh26/69068818426.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/jimolefegorarinas.pdfIn PDF document text
    • http://dezlice.ru/gipunopekimojomazntyie.pdfIn PDF document text
    • http://allerlo.xyz/how_to_replace_battery_cateye_strada_wirelessggyqt.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/gjjijh5/kedovagosogotonigizin.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/edjagcZ/off_road_prado_car_driving_apk.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/52175628387.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigidafavubo.myartsonline.com/48330283856.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_059b6023239b4959b227681342bccf2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/memivenazobumasenov.pdfIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_24b399432c8a46a59323f56eadb1bfa1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purawuma/b_form_course_fees.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_11b9da1296a040709b5625cc341c700c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegebunov/6934026824.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_a6c2562a73f24516a3ed3cd037759394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wofaxil/pumpkin_coloring_template.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/vederofoxo.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_388241ac8bed405eb07cc2004b5bd952.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_94a60c7487cc4f1dac6d98f429389e6b.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_a6fad0054c544ec78dedff2e08ca2828.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_8fa05a0cf7c14062b0c28028dfc051c4.pdf?index=trueIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_398c933864454a5e8c26fdda177bc03f.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 5492 bytes
SHA-256: 28351345f445305a60512544d282ddbda23c2a8f74c20352f70edd21042fcba4
font_01_sfnt_off0001096f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 11236 bytes
SHA-256: 22f56c482ba5bb43d22d6b855b693c1c277ffd600598ee7bc6e89ba0018d9f8b

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