Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c152b174f8e3299…

MALICIOUS

PDF

79.5 KB Created: 2021-01-20 10:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 54aea02e45272c033d40efea85367558 SHA-1: 6d063433ee266fb81d55ef67da6dc2f7c6fd06f9 SHA-256: 2c152b174f8e32992571af76c936846fc8b848acb6fa4d8e69f4f6921eb73b0f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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=percentage+increase+and+decrease+questions+worksheet In PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/2753422.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/dNihbji/litirazawutetanoluba.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/zegifipetanifemig.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/gjNrFDF/jail_break_prison_escape_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5fa4d38fa21b2.pdfIn PDF document text
    • https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/4797679.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/68879961409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416802/normal_6005a0c91baca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5fc447b8a0fc3.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/Hhgehda/zombie_harvest_2_mod_apk_download.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/kovixulikusosekudom.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/lovetijif/64767355264.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/bigo_live_apps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/chess_software_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/white_laminate_sheets_menards.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/angular_5_get_form_control_name.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/happy_death_day_2_parent_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/42603921508.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_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 5452 bytes
SHA-256: 55ade9f970efa8b48d640e8f4a72b4859b8e2ac071228edcea71a5c83e2f7e77
font_01_sfnt_off00010992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 11492 bytes
SHA-256: 220671e4a72fa1f2cc38440c935d7a1c66b32d43d38284fc8aec9f4c19d9ff4f