Malicious PDF — malware analysis report

Static analysis result for SHA-256 041fb9882e93a922…

MALICIOUS

PDF

63.2 KB Created: 2021-02-24 14:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c499bfb6f708146de99b0984f881a074 SHA-1: 0022dbc0b84b61ae7c9d051d5a00881a63585e3e SHA-256: 041fb9882e93a9229f555b62de552e43407e37f75a4abe3c08897acdda9a8008
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://bologen.ru/wix?keyword=brainpop+current+electricity+answers PDF link annotation
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/4309692.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/anheCje/simul.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/ce169eadaa9b4.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/big4Jg4/iihf_power_rankings_2019.pdfIn PDF document text
    • http://repair-monokoles.ru/simboluri_abateri_de_forma_si_pozitie4na7i.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/jfijjaj/hexagon._io_snake_paper_draw_online.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ghieuTQ/furious_payback_racing_unlimited_money_apk.pdfIn PDF document text
    • http://lasns.fun/34037610596skgkh.pdfIn PDF document text
    • http://kkkirrreeee.space/510993025577oww.pdfIn PDF document text
    • http://thedouche.xyz/autocode_font_free6m1gj.pdfIn PDF document text
    • http://alkim.xyz/yearly_planner_template_excelh0asm.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/bkrEKjb/deloperewabanuwekarom.pdfIn PDF document text
    • https://cdn.sqhk.co/gediwuwanol/gpFjcUB/townsville_car_crash_yesterday.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/leributafa/emergency_wallet_card_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/computer_elevation_cad_block_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/happy_birthday_to_me_status.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/gmat_official_guide_vs_verbal_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/53609417229.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/saxon_math_8_7_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/ben_10_omnitrix_unleashed_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/bible_dictionary_online_free.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_off0000bad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD0 5172 bytes
SHA-256: c04b6c1871766fcc838ea08f58236b3b71fe27672532e1906c32507f8118a50e
font_01_sfnt_off0000cc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 10236 bytes
SHA-256: e21ae7573a8d5228e1dd01d2dfb1f09e11652e6ada529855e1197702acaa64c5