Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d460afdea429dc2…

MALICIOUS

PDF

40.8 KB Created: 2020-10-09 11:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8775507409a81bef3f5011b7680651bd SHA-1: e5b28820da31822bf406624030e3db293ed9023e SHA-256: 8d460afdea429dc23355e5ac7b8fd31e881503b38e957b05907cb386a727ec03
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/strik?keyword=athletic+trainer+soap+note+example In PDF document text
    • http://files.giantsparrowpress.com/uploads/1/3/1/4/131437532/subelore_kumupexugelo.pdfIn PDF document text
    • http://sejol.notjustanotherhomosexual.ca/uploads/1/3/0/7/130776716/374de8350.pdfIn PDF document text
    • http://files.huahinlandpro.com/uploads/1/3/0/8/130874124/2650ecfde5ac3.pdfIn PDF document text
    • http://mirijolub.mazzapics.com/uploads/1/3/1/4/131407552/nikigek-wiwozu-gizufematonaji-lafonemokel.pdfIn PDF document text
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdfIn PDF document text
    • https://site-1039549.mozfiles.com/files/1039549/84209139789.pdfIn PDF document text
    • https://site-1039933.mozfiles.com/files/1039933/lemefinofexu.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/1/0482/5822/0187/files/pokemon_white_version_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/5693459194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/57375351088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0747/5875/files/vufabobizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4971/1776/files/how_to_jailbreak_ipod_touch_2g_4.2.1_without_computer_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4463/7352/files/manual_drinking_water_pump_for_sale.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_off00006274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 5228 bytes
SHA-256: f1b7f743c0143061f5ae6e2ea046395a6c26d8320c47750c46eea4be126ac381
font_01_sfnt_off00007418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 10176 bytes
SHA-256: 3d6c77f18cafe328ab59ba6870f68f57d26f478066aed560ac576fe9f2fdd9e2

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