Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9dd872e9b05fbc…

MALICIOUS

PDF

80.9 KB Created: 2021-03-29 18:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fb98ebe7504f4b385ede887f925be994 SHA-1: 7c3cfe486e91024deccb9a13d925f65bf317e886 SHA-256: 5c9dd872e9b05fbcee521562ba1ec241314864d09ac018bf23cb2529d55cdc17
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/aws?utm_term=soleus+air+8+000+btu+casement+window+air+conditioner In PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/e1a3adfb836a8.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/arihant_general_knowledge_book_in_tamil_free_download.pdfIn PDF document text
    • http://in-arenas.com/nupukolofoponalunatirmwdx.pdfIn PDF document text
    • https://zinalojirade.weebly.com/uploads/1/3/4/2/134266028/b718350403c691.pdfIn PDF document text
    • http://lenudes.com/nexuzezomosajulubupagekole8l9.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/xodozanidakuvobuze.pdfIn PDF document text
    • http://top-shop-store.website/46629093803ugvcs.pdfIn PDF document text
    • http://xuzotudaraderuf.mypressonline.com/19984684339.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/how_do_you_reset_a_robertshaw_thermostat.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/9e9cda5.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/2114581.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/latitude_e5470_specs.pdfIn PDF document text
    • http://opticsystem.website/chores_planner_template7p0ip.pdfIn PDF document text
    • http://omynutural.space/tavepobozikeguevoy6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/pandas_groupby_transform_quantile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24e1875-2c41-499d-8873-9348c6c3a537/dr._gundrys_diet_evolution_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85f7732-28ac-49f4-9f4a-9038a0a07b02/school_to_prison_pipeline_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/the_celluloid_closet_book.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/33178489778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3395f2a0-5cf1-45f7-96fd-946b8dab0dc4/46554275813.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/ambarsariya_pani_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d809001-8fbe-42fe-abbb-81b2c7533da1/how_often_do_you_wind_a_31_day_clock.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/xorujubaxu.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_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 5756 bytes
SHA-256: 943a5363ad6e1d5d834002a8752c6b542074d241e5138ba5b2eb4a53a35d8a8a
font_01_sfnt_off00010f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 11264 bytes
SHA-256: cb68119e9bd2420abe3fa1d3d9c87e2f8f0a94adaacf2492b06514e7a804247a