Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b886f136d7ef608…

MALICIOUS

PDF

49.7 KB Created: 2020-10-02 12:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8993513a222d7d0923b66588a35ea792 SHA-1: f44870edd5ef27c252155109733884ee5360b0c3 SHA-256: 1b886f136d7ef608eb5d320e2f13c2d6cf488441f15a5b13e33eb631c8a763c2
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://ggtraff.ru/strik?keyword=cryptocurrency+meaning+pdf In PDF document text
    • http://tapilib.granizoart.com/uploads/1/3/1/4/131453194/natebol.pdfIn PDF document text
    • http://xawewinu.leatherneckclassic.com/uploads/1/3/0/7/130775320/kedisuvatotujivi.pdfIn PDF document text
    • http://files.franco-british-society.org/uploads/1/3/1/6/131606186/2420738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5152/0678/files/apush_chapter_19_civilizations_inferno_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/wabojuxudubezokomudata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6779/2296/files/parowan_high_school_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1349/0846/files/gojasor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7015/5680/files/the_masked_man_creepypasta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/lower_case_cursive_j.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3668/9820/files/how_to_draw_comics_the_marvel_way_part_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1873/4746/files/31021348951.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000856c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 5272 bytes
SHA-256: a03b1906fab3f1d6bc6d50a6fd0d8c3d1d8a60d4ec20ef77c75e8ec9629f99d4
font_01_sfnt_off0000974b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x974B 10352 bytes
SHA-256: 8228b24950b78ad143ef1bf589c3cda89b493be2c85cc58775b79c7156022292

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