Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3d46348d479ff5…

MALICIOUS

PDF

80.2 KB Created: 2021-04-22 23:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 360f1e49274b7f98e811db2f16b253d6 SHA-1: 283ee9af81dc9ee08cc3bf0a0ef36aa513c0a661 SHA-256: cc3d46348d479ff58a52fe8ba01ff4100b6d6683456e12037d67635b8b163f3e
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and potential phishing lure. The primary malicious URL, https://midufefew.ru/strik?utm_term=what+is+the+ticker+symbol+for+s%2526p+500, suggests a phishing attempt disguised as a search result. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=what+is+the+ticker+symbol+for+s%2526p+500 PDF link annotation
    • https://cdn.sqhk.co/gojinuma/exTQ6iQ/cubase_software_free_download_for_android.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/arduino_cookbook_francais.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/il_cattivo_ragazzo_che_amo_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/WQvgcwA/44972350790.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/46442878784.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/apocryphal_gospels.pdfIn PDF document text
    • https://cdn.sqhk.co/fexonawizoz/hcibxhf/hornblower_san_diego_dinner_cruise_coupon.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/18296414886.pdfIn PDF document text
    • https://cdn.sqhk.co/wesifarajaru/hebicje/how_to_ride_your_dragon_3_imdb.pdfIn PDF document text
    • http://copyrightproblem.com/56481158290z2zsw.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/741_op_amp_circuits.pdfIn PDF document text
    • https://cdn.sqhk.co/xurunesijud/8hjcIgK/daxob.pdfIn PDF document text
    • http://oneitshop.info/engagement_party_invitations_templatesp7buz.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jimi6hb/gacha_glitter_coloring_books.pdfIn PDF document text
    • http://trastenmyqort.online/how_to_go_on_a_mental_diet7dpvp.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/j4z81mo/43548066449.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/yjdjgms/87615678170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d429dc8e-fbf7-4880-a14f-f1e93496e896/xasavizapola.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/behance_cv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10917edc-15f2-4f59-b415-06f19ce161d8/dasokolepitulabasukim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaa3387-2170-4782-a0ca-0b42d126265a/96240016819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79153495-0426-49c8-ad9a-2fcf68fbac23/dachshund_coat_types.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_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 5440 bytes
SHA-256: 6d35a187671c289d94196e6d977e08d047ef474213817f80f4dbaa575836ea10
font_01_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 10396 bytes
SHA-256: 81fbf5c60319df321da0182315a63898fdcd0154e6aa0378d41dce2570cb9a4a

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