Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2f62ffce619ac3…

MALICIOUS

PDF

94.5 KB Created: 2021-03-29 16:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 71a71417a50546c0e4e36bf30f3879b4 SHA-1: 414f607cbe60002d5d20d14cf05f5bd171c64792 SHA-256: 3e2f62ffce619ac3f189f04c3d0ff93b4453cfd69d668d14bb48019bd4490196
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or scam lure, likely intended to lead the user to a compromised website for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://xezojetit.ru/123?utm_term=char-+broil+performance+tru+infrared+450+review PDF link annotation
    • http://wufamega.scienceontheweb.net/autotable_jspdf_table_width.pdfIn PDF document text
    • http://vitrinachel.ru/pibinegerasgnkwd.pdfIn PDF document text
    • http://pipvip.ru/wukajoletunudalikobe4hjm.pdfIn PDF document text
    • http://thailandlove.site/58448087350ht6q7.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/karof.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/64026125302.pdfIn PDF document text
    • http://joblanc.xyz/war_as_i_knew_it_general_pattonk6qai.pdfIn PDF document text
    • http://bivaxopepukoxi.getenjoyment.net/sample_motivation_letter_for_phd_scholarship_application.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_813fc59bdac5433893e5604c7671f754.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92873ef-c3c2-4efc-b24f-0922bf20eac1/78841160574.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_44d153596bfc47b9bcc47d816f11ded9.pdf?index=trueIn PDF document text
    • http://tajavuminona.atwebpages.com/76035720798.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/96728635765.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_8ff81471a43a463584564cad0137973d.pdf?index=trueIn PDF document text
    • http://giworutiw.myartsonline.com/zosetudopudogoxa.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/16908913517.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_6960af0f53be498c99ad88c69a15818a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2116cec4-f809-487c-a7dc-9b24b7b21668/screenwriting_tutorial.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/proctor_silex_compact_10_cup_coffee_maker.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_82b7fd3d97154be3a8643a234d6c29ff.pdf?index=trueIn PDF document text
    • http://bemabam.myartsonline.com/pretty_little_liars_episode_guide_season_3.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_off00012e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2E 5800 bytes
SHA-256: 732503377648e3c2640e092290d2ec6bdfcfaebc656d36a90d2b8420d9797cb5
font_01_sfnt_off000141e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E2 11968 bytes
SHA-256: b558ab08ffa58e0e6409af05cf294c4afb308ecc2133e283371845617512ab1f

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