Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b853d20617de4c3…

MALICIOUS

PDF

59.9 KB Created: 2020-10-06 16:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8c246778e219bb168633f90ce06ad479 SHA-1: e565742a52c8c1c2987910f58f6762efefcc3492 SHA-256: 7b853d20617de4c3d82b3211b9f80c6eb36eba5d4bf877718f3d0923cef01122
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/pify?keyword=pokemon+ash+grey+wiki In PDF document text
    • http://dolujuve.estellaseven.com/uploads/1/3/2/7/132740764/nupopejidujov.pdfIn PDF document text
    • http://files.mymaneattractionboutique.com/uploads/1/3/1/6/131637325/140efb07.pdfIn PDF document text
    • http://bikexa.zendowneast.org/uploads/1/3/0/8/130814471/40865.pdfIn PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/34271119509.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/3943843874.pdfIn PDF document text
    • https://site-1043608.mozfiles.com/files/1043608/68050447442.pdfIn PDF document text
    • https://site-1041090.mozfiles.com/files/1041090/26691912587.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/1/0431/1498/7669/files/58792162864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/9538/2174/files/lemewiwepojonoremoxuduzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/contract_law_outline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/derivatives_of_trig_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/xazuxuxujemef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3437/6352/files/cape_fear_river_adventures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0033/files/wikodisugiwamugo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A4 8668 bytes
SHA-256: a4f482376ceb4224cbac44e4452653a7bcafb13e71b426a21aadceedb0d27749
font_01_sfnt_off0000ad96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD96 5324 bytes
SHA-256: 99ff4cea179fbf970c1eff92079fec22655b80a72fdf8a74adcc6e1c6dd0a603
font_02_sfnt_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 10264 bytes
SHA-256: 710cf6bbbaa9731cf863b1cf2d89b021b53762517d905d10a4033fa54ad0894a