Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b83f07a995be8a…

MALICIOUS

PDF

46.0 KB Created: 2020-10-11 08:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e18b69da41a8ad8df49bb3f22097b5a8 SHA-1: 2fa4f24dd71aa98c00838287ee08a337fc98544e SHA-256: 26b83f07a995be8a86f9a73bbd81aabfb023fcfeae9ecc36f81900c17817d240
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://ggtraff.ru/strik?keyword=confidence+fitness+treadmill+user+manual In PDF document text
    • https://site-1045398.mozfiles.com/files/1045398/sugerunefawevupud.pdfIn PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/59854370027.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/11894581323.pdfIn PDF document text
    • https://site-1042776.mozfiles.com/files/1042776/pojikeg.pdfIn PDF document text
    • https://site-1036838.mozfiles.com/files/1036838/1754001316.pdfIn PDF document text
    • http://files.nci-sprint.com/uploads/1/3/2/7/132741130/nulagiz-nevom-muzoj.pdfIn PDF document text
    • http://zofexawow.ddpcycles.com/uploads/1/3/1/6/131637284/1074177.pdfIn PDF document text
    • http://noxudut.helpingourmotherearth.com/uploads/1/3/1/4/131406970/5b25e.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/1/0496/1596/2276/files/53058753074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8705/7062/files/53541549443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6537/9490/files/east_haven_academy_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/make_one_left_knitting_stitch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0241/5269/files/78577499726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/tabesogiwimerujedoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/internal_combustion_engine_parts_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2882/8319/files/fakezedazediwejanemipif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/what_is_the_air_pressure_indicated_on_the_weather_station_model_shown_below.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_off00007624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 5072 bytes
SHA-256: 04401cc1e16a5e92e234228bfb8beba941466f5fd44ad3e134bee090b126825e
font_01_sfnt_off00008744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 10284 bytes
SHA-256: 9c5dfb464babefd3bf5aa2dc99985ef35b223a58c1e217df3f0433da9654c032

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