Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce6e2898f117518…

MALICIOUS

PDF

88.4 KB Created: 2021-03-02 18:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 867847e1e76ae94faf8e7b472ebd5f18 SHA-1: a45fcf8b53eaa642b0208347094e13891e9c4d3d SHA-256: 9ce6e2898f117518d42b32d4b1e11882ee72502b1171e575465f6a770a5b30ef
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to a product, possibly as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://crophysi.ru/123?utm_term=toro+model+20017+traction+cable+replacement In PDF document text
    • http://busurman.space/tutawejagolepipedg3pd.pdfIn PDF document text
    • http://perfectiona.online/dream_dictionary_baby_poopc9yws.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/3330762.pdfIn PDF document text
    • https://vuwisirikufav.weebly.com/uploads/1/3/4/7/134765545/eaa70.pdfIn PDF document text
    • http://womans30planet.com/d-link_ac1200_wifi_range_extender_dap-1610_reviewtpo2p.pdfIn PDF document text
    • http://alisabor.design/xasomic483p.pdfIn PDF document text
    • http://study-english-04.space/the_postman_always_rings_twice_meaning_of_title7qgky.pdfIn PDF document text
    • http://deflecfcvy.best/dovipal20w10.pdfIn PDF document text
    • http://serdyukov.pro/zejiwivovajalipopidarev2visw.pdfIn PDF document text
    • http://topfrag.rip/what_transmission_fluid_for_2009_honda_civict8r92.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/jimef.pdfIn PDF document text
    • http://mixit.info/10727248118ci7ih.pdfIn PDF document text
    • http://deemonatrafik.xyz/amain_performance_hobbies_retail_store_chico_ca346mn.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://s3.amazonaws.com/moduxanakuri/tagdi_song_dance_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/scottish_sun_sports_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/mesiwelexogelakonugosil.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_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 5324 bytes
SHA-256: 6acf43a5d79bae515aeb9690a8476b5269f2c0ef924426874316c4d063918f35
font_01_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 11804 bytes
SHA-256: f4fb7f96d28e5408f1f5ae829943269e8e93ed9e488b9536df8e0e07584d5c00
font_02_sfnt_off00014461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14461 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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