Malicious PDF — malware analysis report

Static analysis result for SHA-256 41430ba68eec544e…

MALICIOUS

PDF

78.1 KB Created: 2021-05-04 21:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 71300014eb1b0c0e8a9fbc05276a14e5 SHA-1: 86657e795b4cab985e4fadc0c51fc822c858958c SHA-256: 41430ba68eec544e032046d1c85b63c829ba904fc37f8e5ed1c955315d4c2f3a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of external URIs suggests an attempt to redirect the user to a compromised or 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
  • 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://xezojetit.ru/strik?utm_term=how+to+check+continuity+on+dryer+start+switch PDF link annotation
    • http://tulusujubige.mygamesonline.org/saxajanupetunitor.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/pujiveximed.pdfIn PDF document text
    • http://navalny.design/rejefizunavstedh.pdfIn PDF document text
    • https://dulubomin.weebly.com/uploads/1/3/4/6/134602246/4452179.pdfIn PDF document text
    • http://italywow.space/40677445699o3dvz.pdfIn PDF document text
    • http://3203epworthcres.com/credit_report_and_background_check_for_renterszqutu.pdfIn PDF document text
    • http://uscarins.info/is_the_gazelle_a_good_workout5av4o.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/n9A4ji3/the_third_day_casting_director.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/hcCqSN9/fipumatufunofelegugape.pdfIn PDF document text
    • https://resumasilazivo.weebly.com/uploads/1/3/4/5/134509929/zadezoremojin.pdfIn PDF document text
    • http://coins24h.com/libro_completo_caballo_de_troya_1_gratisz9x9l.pdfIn PDF document text
    • http://seedcraft.online/2020_election_predictions_vegas7mmyu.pdfIn PDF document text
    • https://lunixomowomok.weebly.com/uploads/1/3/4/8/134859132/4702312.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/Bhjtgc1/micro_pig_breeds.pdfIn PDF document text
    • http://nanolenka.xyz/90629282997ehtgf.pdfIn PDF document text
    • http://hihikane.space/5482688221n838u.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/8b97bbb.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/vfrjiQr/4_person_dinghy.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hhhejd9/tawaniperoroleb.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/VevSWgh/yeezy_500_utility_black_restock_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/dIwic7n/fedemobuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawokale.myartsonline.com/how_to_teach_main_idea_4th_grade.pdfIn PDF document text
    • http://mujebik.atwebpages.com/26707643127.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_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 5212 bytes
SHA-256: fc4f8168afc410183abc8b4f2e8e5e7729bd13c94dfde78c83463c1c701cc28c
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 12020 bytes
SHA-256: 906ad798064743b120bf36cf7aebdbbfb165c95361ed44c7f77daf45df23582a

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