Malicious PDF — malware analysis report

Static analysis result for SHA-256 828634de7bd9df8a…

MALICIOUS

PDF

38.3 KB Created: 2020-10-11 18:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 047aaee28c35d63f569584630867873a SHA-1: eac890c6d5d0c1c79fcfda739f9291a8f364efbc SHA-256: 828634de7bd9df8a6895edec7d39a547b30c2649a018783112624b678f174480
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/pify?keyword=2004+ford+f250+diesel+owners+manual In PDF document text
    • https://site-1043053.mozfiles.com/files/1043053/42225636259.pdfIn PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/52980003868.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/pibukigomu.pdfIn PDF document text
    • https://site-1042205.mozfiles.com/files/1042205/losigoxuxa.pdfIn PDF document text
    • http://kevalitob.bathhousebasics.com/uploads/1/3/1/4/131454165/773c047422b.pdfIn PDF document text
    • http://files.engage-physiotherapy.com/uploads/1/3/0/9/130969522/regofelosiv.pdfIn PDF document text
    • http://files.swifttgsolutions.com/uploads/1/3/0/7/130775704/6830492.pdfIn PDF document text
    • http://files.nccsecec.org/uploads/1/3/2/6/132683024/83421297c0d8a7.pdfIn PDF document text
    • http://files.theartofbeautyteam.com/uploads/1/3/1/4/131454415/1325990.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/21691231178.pdfIn PDF document text
    • https://site-1043047.mozfiles.com/files/1043047/13812900150.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/1/0438/6213/0853/files/8.7ga12_pump_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1173/5193/files/disney_world_orlando_driving_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8031/9645/files/riu_riu_chiu_choir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/diwasepe.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_off0000574e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 5536 bytes
SHA-256: 9fd23dfda371ab63c1f7c035dddb679903bf3a4e71fd6b6afb4cb01a5e7408d8
font_01_sfnt_off00006a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1B 10000 bytes
SHA-256: 1bec11f0d7aed89002b42ad9a649ed555eaabf327a6fcb4797c624aac88d61c9

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