Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ba32729ee84b39…

MALICIOUS

PDF

78.4 KB Created: 2021-03-03 04:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d9377cf1ab588d0b6f80f3db19cd9c1b SHA-1: 4da9b68a5bf8e3a3578ba9510b3005b05c5a50f3 SHA-256: 35ba32729ee84b3915d0371f059a46783cf8a22d280eab9acb536148b8f74f87
184 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, includes a title related to 'co curricular activities' which is likely a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly suggest maliciousness, pointing towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/strik?utm_term=what+are+the+importance+of+co+curricular+activities In PDF document text
    • http://joxorapux.22web.org/ludesosasomabim.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/cmwMzhf/off_road_taxi_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/jjgenQM/75531553313.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/5jcQijG/us_murder_count_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pifizumux/GKMijjz/demolition_derby_2019_uk.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/13920178331o6qo4.pdfIn PDF document text
    • http://topstop.site/action_replay_dsi_operations_manualisg6h.pdfIn PDF document text
    • http://bcipreactivaperu.com/20308091603rxc70.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/jg4X5ii/52069201611.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/how_much_do_reiki_practitioners_make_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/xejarirep/hc2bBij/legimobixogitiv.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/ilagc2z/spring_hockey_teams_near_me.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/51523841751.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/zifilobesumafi/jax_jungle_guide_9._19.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/vufit.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/gowiposuxaxaxekotik.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/povukadaxalakinelewut.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/where_is_moisture_sensor_on_bosch_tumble_dryer.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_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 5328 bytes
SHA-256: 24f33687e3de53c36abb9473e1bb82ea20c82a4c4a9b28030f111081c995d88b
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 11524 bytes
SHA-256: 0dc1dad51cc76626938776a516e751459439e76c1d80adbaea26e8a83039c9be

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