Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef8214474655ec3…

MALICIOUS

PDF

45.4 KB Created: 2020-10-18 06:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ebe493fb3b76df02161e57cea86f88e8 SHA-1: f64300deb61875d0bacac151011157614ceefa83 SHA-256: 7ef8214474655ec34e6343c3303dda4d2cac207bb4adf1e011712f3dcf788fba
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=how+to+bench+test+a+wiper+motor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f8aaffa176a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8b1b4c5a7ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f879f9ad1691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f870afe6daaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f891b42d567e.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/xanilo_diminakobena_rowowaxakigo.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/saxozejuziwilem-sozobojufiwaman-tiwejolatazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/564e25b6-8930-4666-83eb-4e4b377313e9/pesenibuvobidov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9ef7a9-c50a-44dc-b2f8-b6c3887e7558/4210792157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7c1803-75b0-4f69-b5d3-bd5264b05e5b/upstream_elementary_a2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9798ff88-aabd-4b8e-83ea-a9b9efc74dfd/keredapuvorenasewuloboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b396577-0166-4c1e-8033-abf26854ba4a/11668768719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c4cf53-4c4a-41d6-83a8-0518d48de62b/entry_denial_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e10c79-47df-46a1-b925-982e497a6c68/tetabojojilopotoweratutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1416/7965/files/32680054259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6375/3369/files/global_standardization_strategy_and_localization_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7523/2452/files/simply_ming_pressure_cooker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5392/6558/files/nine_algorithms_that_changed_the_future.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1108/8799/files/kekuned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0639/7096/files/trial_by_declaration_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/68632664144.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_off00007416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 5332 bytes
SHA-256: cec8316907203d6b3e903648ad484a162659474527c9edf124cab82c91d9faf7
font_01_sfnt_off00008617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8617 10000 bytes
SHA-256: 51e5120ba6234dd69ef4be46ef5f9f08b74eae4a59dd795ac92b6a94af98734b