Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b79a8f28a20015…

MALICIOUS

PDF

41.3 KB Created: 2020-11-06 03:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dd0d922ebe845a97bac35f4f9902938a SHA-1: c4a303cfabc92b3aafcb22b1c22843deb903dae3 SHA-256: a3b79a8f28a20015462fbacc648195fd27e580dbd2dd725400e18e0ce0faafe8
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?keyword=wolf+with+purple+background PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f949396a551c.pdfIn PDF document text
    • https://saniruguroxi.weebly.com/uploads/1/3/4/5/134585545/37921c550f21d3.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/4b26c3b70bbd7a.pdfIn PDF document text
    • https://rivibesosad.weebly.com/uploads/1/3/4/5/134529272/vixatabevu.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/cc53191a-ebd5-48b9-a911-0896cfa6a889/50013999039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1552020c-396a-4470-a33f-cca93dc8f8d8/early_admission_colleges_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91306fc-207b-4324-8fb9-728d1596aa88/take_back_the_night_lyrics_justin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59324a8-f06f-4d21-ad3b-304d6405e841/dafanebebif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154f6e2f-e89e-43ae-b464-555b243e34b4/50882050744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3aa61de-8618-427c-a134-8f97b39dc9da/fesotikufonufifem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8189c9d1-3b55-488a-a353-dcb85b8ea53c/inequalities_review_worksheet_answers.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_off00006199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 5548 bytes
SHA-256: 97e1c1969b66c2f49073dba84c94f5c4c9efc806b27003379de4d0c5b341b928
font_01_sfnt_off00007485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 10712 bytes
SHA-256: 815b2b3268df2a061714ecb8915b2fdc300391cf2b28c59165369bdc23b547c5