Malicious PDF — malware analysis report

Static analysis result for SHA-256 42dd7d92d5f8cd20…

MALICIOUS

PDF

37.7 KB Created: 2020-11-04 01:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 48e29f696f2bd14d8c5019210f6b5627 SHA-1: c012c51f1086e043bcb169f3b3d7b019b12b2232 SHA-256: 42dd7d92d5f8cd20faac3f5d0a982399e2eef7a4d088136e91f9dd60ef9fd439
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=math+aids+worksheets+answers+surface+area In PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/pemar_dugoregulaxal_wixovomidinor_lepiruxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8c7ba114af3.pdfIn PDF document text
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/21d53835e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fa141fe61a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f973eda60143.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.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/zirojopemup/gelatevopumesukijow.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/tutumafom.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/mumeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45633ec8-ece5-4c3e-b1d9-dbb8d9ec171d/duribibakovulese.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/kentia_palme_zimmerpflanze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94e14f4-24b4-4659-ab6a-c4704ab37c43/everything_on_it_shel_silverstein_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/section_2_conservation_of_energy_answer_key.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_off0000565d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x565D 5236 bytes
SHA-256: a933db88b7f1bd27ec2cb93247e18e536e7ab11ac343248103d2bd091f33d930
font_01_sfnt_off00006847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6847 9968 bytes
SHA-256: 648bfd222810a42765167461ae461eb8eba89581429881121a786866ec08dd21