Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09126f0a20a4eca…

MALICIOUS

PDF

96.2 KB Created: 2021-04-28 14:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50b65ab286b1c64013549e27e0ca38e9 SHA-1: 133fd324369117fb89563274001abfdb9c9ab1fd SHA-256: e09126f0a20a4eca60ed7413cd1af4be4a0c73206d38d2adfba8b3772dd1bf7b
166 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high-severity rule indicating suspicious invisible links to a malicious domain. The document contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dafemum.ru/strik?utm_term=will+silent+hunter+3+work+on+windows+10
    • http://bigno.space/69076820670ye5mg.pdf
    • http://workbykoder.xyz/samsung_galaxy_note_20_ultra_date_de_sortienoawf.pdf
    • http://topmassage.net/84699363604ubqrf.pdf
    • http://brosbass.com/zafasanugejapugexototugobuq58.pdf
    • https://cdn.sqhk.co/duwokarewesu/jhghgY5/big_bang_ar.pdf
    • http://okstore.info/how_to_date_a_browngirl_whitegirl_or_halfie_summaryle0fn.pdf
    • http://securitycheckingbrowservkcom.xyz/why_wont_my_hp_printer_turn_offsy53o.pdf
    • http://vitrinachel.ru/89660813964888em.pdf
    • http://fishland.store/does_peep_improve_ventilationv7f71.pdf
    • http://podarokinsta.online/hamilton_beach_22_quart_roaster_oven_cooking_timesn9pdb.pdf
    • http://nikecortez.net/presto_05466_steel_deep_fryer_dual_basket_profryu0byy.pdf
    • http://fastpysystem.online/143_isle_of_pines_rd_mooresville_nc_2811795r8l.pdf
    • http://toolsbestpricemicrometer.site/44082307703wf2bj.pdf
    • http://goromeo.club/mastering_apache_spark_2.xn09wj.pdf
    • http://fuxarirudutosas.iblogger.org/639729916.pdf
    • http://tegor.xyz/96910514625h0tfq.pdf
    • http://rivezetufizi.iblogger.org/lagijatapamobilidovo.pdf
    • https://cdn.sqhk.co/xafiguzi/fjhimig/59780803984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tofezigiserix.rf.gd/52571455358.pdf
    • http://pobikifi.rf.gd/armament_technology.pdf
    • http://davirokonal.epizy.com/booster_pump_system.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ac.bin
272a7c1985a8caec62e18059a655a6bf8ba50cc57258d681aa86553287b9cd7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 3388 bytes
font_01_sfnt_off000114d0.bin
b6129c63357948b3957f7f9d936c71e879cfaeeb695415fc8eb842add1bc4631
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D0 5232 bytes
font_02_sfnt_off000126ab.bin
a7c5a0f791288ec0e82f0b8f06c43e61ddceff2eebd082596a43887292e0244e
pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 3516 bytes
font_03_sfnt_off0001344f.bin
f13095a5daa6a791f0da65231404370e8b019663296ef470fecf3e44d6f7a893
pdf-font-stream PDF embedded font (sfnt) at offset 0x1344F 11304 bytes
font_04_sfnt_off00015b24.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B24 16204 bytes