Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d375819ad2f2ff…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 20:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aacc93a516f4e648fa189da985bb4886 SHA-1: 04d53a60bf4c9db41497c560cbf156724759097b SHA-256: b7d375819ad2f2ff6688a9e9c1f09d20e59c3542b6dd79862649b6172f7d12c1
314 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/aab78ad1d8.pdf.
  • 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://yafferge.ru/award?keyword=the+giver+chapter+10+discussion+questions In PDF document text
    • https://cdn.sqhk.co/xedufoga/eUSicjg/metal_slug_2_download_uptodown.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/aab78ad1d8.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/riijegg/circus_funhouse_lemax.pdfIn PDF document text
    • http://criticcxck.space/english_grammar_in_use_advanced_amazon9qlqc.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/maquina_de_coser_singer_brilliance_6180_manual_en_espaol.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/69fd9b256615b2f.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/70b16.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/jaqjeCi/xbox_series_x_price_walmart.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/849f685.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Nhfangc/free_books_to_read_after_breakup.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/lavewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bajekixizosi.myartsonline.com/how_to_make_coffee_in_hamilton_beach_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/bhole_bhandari_bhajan_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/diagnosing_breast_cancer_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/88842053239.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/air_force_1_shadow_pastel.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/academic_ielts_essay_topics_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 5512 bytes
SHA-256: c83007850728e34661dbf2427515beb465a78630cfe562e3764b445ebc5bd715
font_01_sfnt_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 10368 bytes
SHA-256: ecb6cc1a2dfa039fcabe4b2422273bb05ca46c2a48ead44a784c525e1310e833
font_02_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f