Malicious PDF — malware analysis report

Static analysis result for SHA-256 d345f44f9cd9997d…

MALICIOUS

PDF

84.6 KB Created: 2021-03-20 23:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa1a2c808bc7762562f232c34bf64b87 SHA-1: 8a95db4fd654a804335eb2312da21b09d6dcf82a SHA-256: d345f44f9cd9997deafdf33b5a7d7f9f2b46d53efdc0aabb52efcfa798924479
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://kuzutuzo.ru/wix?keyword=the+hawaiian+feather+cape+was+created+to+be+a PDF link annotation
    • http://xugerovogubex.22web.org/lubefofigazudovodis.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/a5802ace6fb.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/jdjfxjj/44185958109.pdfIn PDF document text
    • https://ginimowawogob.weebly.com/uploads/1/3/4/7/134753870/momareti_zexizi_pujiw_damiwowiwom.pdfIn PDF document text
    • http://xalowazejadiv.getenjoyment.net/17045679694.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/oYsshjj/student_beans_id_register.pdfIn PDF document text
    • https://cdn.sqhk.co/naritiba/hnhbicH/totally_battle_simulator_game.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/vomoxirame.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/biruvoka-pumapiwiluv.pdfIn PDF document text
    • http://dimax-matrasy.ru/78853140546jm42y.pdfIn PDF document text
    • https://jarivilil.weebly.com/uploads/1/3/4/0/134012847/9163952.pdfIn PDF document text
    • http://hristogrigorov.com/91739306799nxm5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/24884647-1d6f-49cd-83c3-68789c630e5b/90402867342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a284952-e22b-4bee-9274-f2b965ab3c4d/gone_michael_grant_age_rating.pdfIn PDF document text
    • http://rinexevijexaxi.epizy.com/jexagasipudupiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99df51b-387a-426b-bcf5-843426da8bd6/nonlinear_dynamics_and_chaos_2nd_edition.pdfIn PDF document text
    • http://rovosaba.rf.gd/proper_scientific_citation_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0656a4-5a37-4310-965e-df5c3b4fc18c/which_is_better_for_losing_weight_treadmill_or_rowing_machine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 5180 bytes
SHA-256: cd6f557ebcd13ff9767a83618468e5431191740a4ee1504266f3bd72f4553ea2
font_01_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 11424 bytes
SHA-256: fc5856b1e1619a31484a15bd1ab57010358def8b31213f805d2e729bb9d4d514
font_02_sfnt_off0001348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.