Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2911570ae49cf2d…

MALICIOUS

PDF

46.4 KB Created: 2020-10-11 22:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 03b031625613c58a53c0704b097e513b SHA-1: ba0a7bdd63ce74845c86f7863cf9e5eb2ef6f7ab SHA-256: e2911570ae49cf2d65f2d289105bd31f62fde28d1c12bcf14b3d5c53589cb78f
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=bdo+how+to+water+crops In PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/26665163737.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/48882346611.pdfIn PDF document text
    • https://site-1039329.mozfiles.com/files/1039329/turisabuwumijen.pdfIn PDF document text
    • http://fuzudiz.pillagerboosterclub.com/uploads/1/3/0/8/130873830/dusobemat.pdfIn PDF document text
    • http://gudibus.christinevandeemter.com/uploads/1/3/2/7/132740748/xutapivozegizaso.pdfIn PDF document text
    • http://galoxejam.jaldridgephoto.com/uploads/1/3/1/8/131857112/patewadod.pdfIn PDF document text
    • http://files.chefmichelepizzulo.com/uploads/1/3/1/3/131379054/5800037.pdfIn PDF document text
    • http://popuvidim.foodlust.net/uploads/1/3/0/8/130874511/zenurexogimib-zenujaxogiwoxu-regaredonunemok-ranekapoji.pdfIn PDF document text
    • http://files.kcorbinfocus.com/uploads/1/3/0/8/130873758/feramowigutigonoxib.pdfIn PDF document text
    • http://vovom.ventureswinterguard.com/uploads/1/3/1/4/131453645/6837357.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/1/0437/7326/4030/files/42048696010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5381/4438/files/gorezusoroworonej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2280/5913/files/67660356267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1970/5761/files/tractor_wheel_weights_vs_fluid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6271/3754/files/math_1_permutation_practice_worksheet_answers.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_off000078a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 5272 bytes
SHA-256: c587d8202dfb35de9556a6982980524076b51391e80e9332dd0f20b4bf186a4f
font_01_sfnt_off00008a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9D 10068 bytes
SHA-256: 15c99566ea9da464ef4135660df88d91e30c9ac4c8a61e5e2282573db1149ba1

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