Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef2abf3b4a0d296…

MALICIOUS

PDF

49.9 KB Created: 2020-10-28 20:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a447fd440c0eb4ab4ba11e0d71a4bb16 SHA-1: d2030e1b7faf6d28d4928cef634cf4c19f0c184a SHA-256: 7ef2abf3b4a0d296f6d3fae6ae8e1e7ba2bf4a8843e12a318184acdb92ee21c8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=smart+switch+apk In PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/0d3609706a764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9500c247e24.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/jopururedapuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f96ffc11bd84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f98409962b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f94c256e8a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f934f56e2291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f871c31f0533.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/986f37a0-6e09-4f4b-b425-0ac4b40812f2/to_kill_an_empire_skyrim.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/sinubivevepupe.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/dobab.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/6018516522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccdacc82-5934-4d69-8e86-d9bd17462129/daximujagedesoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2d3c1d-6b37-4ac9-b063-9a968655e13c/venom_free_movie_stream_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfb6c76-5581-4ec4-ae4b-67fb2f046072/25685247468.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/14487995621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2442ae30-f051-4a32-883e-3c7f1cd75200/19336558237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64787ed7-7639-48d4-94e2-7f490794784c/96366620440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485d2667-b700-45fb-af41-876642d49d47/potobosesepalezewixakaseg.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0F 5400 bytes
SHA-256: e1ed0988ae6c5c07f4960425fe3d0f05870c56fe1079fcc33363385a789b4e28
font_01_sfnt_off00007c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 12664 bytes
SHA-256: 4a0669d926dff5e528218069afa8f034fd6eb2cbd0adcc19d6b21792970a9715
font_02_sfnt_off0000a49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49E 16268 bytes
SHA-256: 2e8f36a8158f76d206cbb338ee9568e11ac34765e06d0776172607053521395e

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