Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4d93f6dbbe4858…

MALICIOUS

PDF

44.4 KB Created: 2020-10-18 11:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: be0a401dc408f34a90071f83a72abab9 SHA-1: e0447e2b3ac214f2c9b77a0f79d522166e7a8425 SHA-256: 9c4d93f6dbbe48584cf5314821c8d0cef41e0064e7a2945f67cbd2c37e14ee05
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/123?keyword=2020+dodge+durango+repair+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5f8bab3875faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f8884b396389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f8bf891b626c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f8aea1ff0462.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/99b44ff8228bfeb.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/tobunafekapilob_goris_mudevozofividil_gozigogufuxaf.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/ca12c5e5.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/a6ecbf06788df.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/84eafd6a51bf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/zufedafolo-ripotaz.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.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/1/0268/7886/9691/files/66494037964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9548/5352/files/cpm_algebra_connections_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/rca_galileo_pro_11.5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3717/9042/files/marowabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/80051558774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8159/9643/files/varosifapexapawesibej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3295/9912/files/6118058951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/how_majestic_is_your_name_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0153/4873/files/physiologie_appareil_gnital_fminin.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_off0000634a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 5360 bytes
SHA-256: 74ff5950a238033742fd566473400cce00ae8a5d0318e9fc0271ac383163e191
font_01_sfnt_off00007566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7566 15108 bytes
SHA-256: 271f9b350374b05f47a714f03346ed6d003f800bc9e56e17739361fc45610181

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