Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c9f6bab01431fe…

MALICIOUS

PDF

40.1 KB Created: 2020-11-06 17:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 3c03a667bdeef8dfb6562c59b325fc57 SHA-1: a8a92c9cfbf70222dcaca827d16c250b660a8546 SHA-256: d5c9f6bab01431fe30e5b0c1f948e0b683f4fa8bf2a96bddd95bcccb29276582
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://traffine.ru/aws?keyword=clicker+remote+manual+instructions In PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gigufoteworakef-bezari.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/d51f2446ddddd6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f9398f53d2c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_5fa34cdd2e1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_5fa4143b883c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f9afc26010da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f891803575f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f8f6199c69d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/7_levels_of_communication_power_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/dhl_clearance_event.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/equivalent_exchange_minecraft_1.7.10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf82cc3-9591-44e9-9aab-959887cc1396/abrsm_grade_1_theory_past_papers.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_off0000620a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620A 4916 bytes
SHA-256: e4520443dfa9f74078b6d3686292097e3f169c94415184098fa5f8b7376cf8e6
font_01_sfnt_off000072a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A5 9756 bytes
SHA-256: 179a2f4b1d873fa2efb0151bb147bc0b3a57a287632ccc0bb824703f44af390a