Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f152df34f1a4e26…

MALICIOUS

PDF

44.6 KB Created: 2020-10-25 17:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5ff9de2b382041b02bf7af69787336f8 SHA-1: eaae4be3580a82b16522b89f334e05f17d23256c SHA-256: 2f152df34f1a4e26bf711a9168e3c570712012cfa45afb0e48834a3289f42ebd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the primary purpose is to lure users to malicious sites.

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://ggtraff.ru/aws?keyword=types+of+valve+actuators+pdf In PDF document text
    • https://voduzivesaduv.weebly.com/uploads/1/3/4/4/134456438/lixitobubatodovuno.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/togezonuw.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/7773707.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/7639018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f93fbb411748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f8fafd33b017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f88115baedb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9692/3040/files/mtabolisme_des_glucides_exercices_corrigs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3982/4316/files/vpn_gratuit_android_free_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2745/0014/files/marvel_vs_dc_games_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/96623212647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3734/0060/files/minecraft_pe_download_apk_0.14.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7931/7676/files/14443360567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/rekemetefejiloxiruja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6120/5924/files/7896797769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9371/1776/files/72549042959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/pandora_initials_charms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2791/3640/files/tumuvuvobofefaxexojo.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/gre_mnemonic_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/31774561610.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/antidiabetic_activity_of_medicinal_plants_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/dobuwopatal.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_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 5260 bytes
SHA-256: 84eeee2bf160b7085a67660dd9ef8a909b013d1b624695aac91d1c594cc72f74
font_01_sfnt_off0000819a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819A 10408 bytes
SHA-256: 1ef5f5c86686b89da8deca859c38de92bb644a93654de071d9deb6242afee640

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