Malicious PDF — malware analysis report

Static analysis result for SHA-256 afad785d3a6ed158…

MALICIOUS

PDF

69.2 KB Created: 2021-03-24 19:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b57ded907fc86652cd49eb11ad82436d SHA-1: b0c28f977b8a77da54bf6d35cc9d4f870ea9b127 SHA-256: afad785d3a6ed158a95c2788d4c97b48ed972ca3e82d53c741fa596049aa71c0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://baarspo.ru/wix?keyword=nuclear+power+webquest+answer+key PDF link annotation
    • https://cdn.sqhk.co/tavikalamo/jdNWiid/takeza.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/5j8whhn/vujigonumokanosonebo.pdfIn PDF document text
    • https://waxujonugo.weebly.com/uploads/1/3/1/8/131871493/vilulukerabek.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/9dgeief/taptap_pubg_mobile_global_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_60273991bf27e.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/gumurexudomewa-foxikijaxajos-visiwuxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fd9b2c3d27ab.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/jjelphf/samsung_portable_ssd_1._0.pdfIn PDF document text
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/3612874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_602ec457e82fa.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/11139acb-35ca-4dfa-a894-31deb5f487b7/48563561791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896505cf-56bb-4df1-a517-b65c98b57e35/fisher_price_sweet_snugapuppy_dreams_cradle_n_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190b085c-c623-4c94-a3d3-c8bb7d04feff/lawuroladegekowiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c1cb9c-7014-40df-98ea-f3782178d58d/letisirupiruzag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77a49f6-b890-4605-8a59-41285c92e43c/directv_genie_mini_won_t_respond_to_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3ce3b0-7083-43e7-b596-fc9cac06234d/snapper_mower_battery_wont_charge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bb7d55-02b9-4d3b-acf8-e81ab1e5401b/10743525899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7738e5-0e2b-4a1e-8fa1-4fd33148d9da/oh_whistle_and_ill_come_to_you_my_lad_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74842e8d-cd4b-43f2-adb5-7821c49fbd18/mapa_conceptual_de_los_6_niveles_de_lectura.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_off0000d2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E9 5420 bytes
SHA-256: c5ed8207f9f7ff7902dbdeed930521a781e1d64ec5aadc2a0decaf99a8e16fe3
font_01_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 10116 bytes
SHA-256: 9a344db852c343768f4f8a4db724f710781e96b31a36914d7e0b2866d1e3b17d

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