Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb2f8545fde4ecd…

MALICIOUS

PDF

62.4 KB Created: 2020-10-04 06:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ea19bf1b1e9cca737bb1cf4f25241c2 SHA-1: ead05e8b0cd678741099ed10ffcb7ab12ec710ad SHA-256: adb2f8545fde4ecd2ad462e0315dc2d9059c6000df66b966b85440f80005214c
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bowie+knife+template In PDF document text
    • http://files.iloveartstudio.com/uploads/1/3/1/4/131410479/e236f0915f.pdfIn PDF document text
    • http://files.wayfaringbride.com/uploads/1/3/0/7/130775563/fegup-jufopilidojagun.pdfIn PDF document text
    • http://vilifejob.koehlertile.com/uploads/1/3/1/6/131606027/1471476.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/lepenesutitiku.pdfIn PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/dovugodat.pdfIn PDF document text
    • https://site-1039632.mozfiles.com/files/1039632/repukujibimijobelix.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/83707094565.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/38350669034.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/1/0431/4651/0498/files/40591629879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1874/9605/files/88245430603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/8503399603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/brier_creek_elementary_thomasville_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9970/1406/files/csi_web_adventures_case_1_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3783/6710/files/ms_chicken_maidstone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5590/9537/files/jetabemajemozov.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 4976 bytes
SHA-256: 1b75348f424b6b6e864080117d31a8fecbc5baa51bbff921bb668588b657dcac
font_01_sfnt_off0000c4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B9 12820 bytes
SHA-256: 5877af81e439d8d256d333c66ecaac86c0489d1e81ba9cdc7b113d8657c30cec

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