Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a8168a5aa16899…

MALICIOUS

PDF

46.2 KB Created: 2020-10-31 01:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0db910e93d3bc28e3d177bad5c9c2e2d SHA-1: 54167596279fd47f0a02de46c850a9a4fdd2d933 SHA-256: a1a8168a5aa1689929b7380337d5c9f98774ab7256bfd8b47ca1d31071328921
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.me/123?keyword=hot+wheels+apk In PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/vujutelojewuxumaxore.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/9f1ac3284bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_5f9c9bc9666f2.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/19a23b98-cefb-4582-9eb7-4a4888baf808/858717119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fb1d4d-1555-4133-b2e7-a74325126e5a/52807941495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d028136e-374d-4afc-892b-17f7d31ae49a/masapilexepajobivefoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/firag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9908/9824/files/17541951215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8838/5448/files/rorosapa.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/bible_quiz_questions_and_answers_luke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/accef868-4bfe-4571-bdad-b185e67b5b11/sodeganomovafaworimazigeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f74105b-98cb-4cf4-b3c8-4b0bd44bad5c/83304211261.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_off00006796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 3548 bytes
SHA-256: f0cd24f6ae5754a314b3fa819c5be693582bae9d17bb9191474b5a748efe29aa
font_01_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 4928 bytes
SHA-256: 4aa6572947e9d6125b2966ca2079e3095dbffc8257715a80c23bcbbdcaf2dadc
font_02_sfnt_off00008512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8512 11504 bytes
SHA-256: 4b0e61d432ba78847dcdbd710e2d063799ad0af212a95e70fd6f06860294f460