Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c68deec5fd623f…

MALICIOUS

PDF

65.3 KB Created: 2020-10-04 01:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 78c7d9ba717cdf3cd4e9276af3038eed SHA-1: 336fee97e8eb17ad7ea55ae17a20c9d010150a5d SHA-256: b7c68deec5fd623f62635aeb14134c9fdb808b616a51f4157ca5a4ba66bba6d2
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://gettraff.ru/strik?keyword=abituriyent+jurnali+2019+pdf+indir In PDF document text
    • http://patufus.evanobranovic.com/uploads/1/3/1/8/131856979/gesiz_kinagisotawuk.pdfIn PDF document text
    • http://xudutukir.karenmccooey.com/uploads/1/3/1/3/131383599/a420935e757.pdfIn PDF document text
    • http://kedeguto.mollymarrinbasketball.com/uploads/1/3/0/7/130776031/e78a05e414.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/60720536474.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/fedebipobewur.pdfIn PDF document text
    • https://site-1041384.mozfiles.com/files/1041384/pawabinoputomipuxenoneku.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/1/0437/2915/8295/files/gamo_air_rifle_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/jubod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3397/1866/files/lonemulowanopugadidefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/xazosafikilinebozeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1570/6523/files/dmv_home_ave_maryville_tn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1403/7919/files/miroxuvuzomuforujavow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/19762005362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8044/4832/files/unit_4_worksheet_12_finding_asymptotes_of_rational_functions.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_off0000b3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BE 5644 bytes
SHA-256: 03ffc7c32459f0e7b88b9cf65d8eb9a6c2d76fc20d28a33f493c9aba041f3834
font_01_sfnt_off0000c711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC711 16716 bytes
SHA-256: cc8ab30a8a26b9d08ca014d70083c1c6f33090da4034d54e58986ae4a2cb5a13

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