Malicious PDF — malware analysis report

Static analysis result for SHA-256 6203035c56bd8b72…

MALICIOUS

PDF

88.6 KB Created: 2021-03-24 07:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a59a708d91736c487b57cf273dcaecb4 SHA-1: c54d5a108deefdac60679e9e081e48e96c5a2b64 SHA-256: 6203035c56bd8b72b4236160874b6726caa556e949c39d893cf61b597079a60b
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an SEO redirector for a 'free-download' scam. The primary malicious URL identified is https://xajibur.ru/award?keyword=argumentative+essay+outline+pdf, which is likely part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/award?keyword=argumentative+essay+outline+pdf PDF link annotation
    • http://cloudplay.xyz/kibevosigatonojovomemakik51kio.pdfIn PDF document text
    • http://kyrgyztours.com/99667345894c8xp9.pdfIn PDF document text
    • http://mon-cmso.best/390622456u3lnc.pdfIn PDF document text
    • http://adachivia.store/free_download_social_psychology_textbookb5278.pdfIn PDF document text
    • http://my-favshopd.online/pokikaluximemetenewemije3bxzg.pdfIn PDF document text
    • http://legendarycraft.ru/the_deep_peter_benchleyblewt.pdfIn PDF document text
    • http://gratoraama.space/classified_balance_sheet_from_adjusted_trial_balance4jtvn.pdfIn PDF document text
    • http://3gusevshop.website/bdl50_la_d704p_schematicmwud4.pdfIn PDF document text
    • http://natural-shop.info/42537734590lpdt0.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/muxozuvalubi/adverbs_of_frequency_worksheet.pdfIn PDF document text
    • http://neriwapawegos.epizy.com/latitude_and_longitude_battleship_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/josonixijiwirenonixolor.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/zalozupotoresufepi.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/cowan_lake_ohio_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/kung_fu_panda_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/fajizezabofeve.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/79421317894.pdfIn PDF document text
    • http://rapuzezu.epizy.com/makro_catalogue_2020.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/nevewixobevido.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/true_balance_check_and_recharge_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/samyutta_nikaya_bhikkhu_bodhi.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/fufafuwakafo.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/50109508508.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_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 5512 bytes
SHA-256: 9fb1941321c0350165700b2d86e05fd99af01e738331a6ff92e4d5f2be7b187b
font_01_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 11300 bytes
SHA-256: 018bb549cd7840ead1a083a8a4240491115107a55faf9da3633e0bf44294fa18

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