Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3ccc5645e761eb…

MALICIOUS

PDF

43.9 KB Created: 2020-10-26 06:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 26a4669bd5cb50b91b13dc8856ea9712 SHA-1: 18aa5a45bf4ac87dd69df2793c4b91d01d18dc56 SHA-256: 6a3ccc5645e761eb6c9388908b2d6afd5cbd73461e35fa3c7504f00070d70b93
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?keyword=systems+theory+book+pdf In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/ganowax-gotedi.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/6034092.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/3453415.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/280069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f8a8988bdb56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f93ad0865894.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/zusoba.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/7901376.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/zufuxufujo_dojowilevelo.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/5a4397.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006e18.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006e18.bin)
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/managerial_accounting_14e_garrison_noreen_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8125/8939/files/mathematical_statistics_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/98322281891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0677/1356/files/best_study_guide_for_texes_math_4-8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6206/5828/files/commercial_invoice_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5875/7277/files/24496140164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/vavegitewoxepozazago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9126/8262/files/craigslist_hawaii_oahu_cars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35857dc1-e2c0-4d23-a6bf-e863aaadb378/33087956893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a134ce52-0bd5-457f-a3d0-6108f8e2f0f3/kimya_dev_kapak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d6ce59-aa7c-48a2-9551-819d710a9dfc/85157771323.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 extracted file (font_00_sfnt_off00006e18.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E18 5448 bytes
SHA-256: 053bc6d7869d788670f54fe62ff5853f25e1818b600a2931bc792ff452897f1f
font_01_sfnt_off0000807e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 9904 bytes
SHA-256: 0def89689ac714cf83fefaad7902f8ba55ae2f5854d4461a959a7c5d97018742