Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa7f168d0b67a48…

MALICIOUS

PDF

68.4 KB Created: 2020-11-03 19:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3157a358b2a541ec51b26b47a589a99b SHA-1: 71d6c945f8a7c37ba370015833f1d0ab0b11f948 SHA-256: 7aa7f168d0b67a487493746f11fce0e8548ed94e211db025f10cf51a24e7d26d
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://ttraff.me/123?keyword=azrael+lucifer+wiki In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f97ec896742f.pdfIn PDF document text
    • https://zufakuka.weebly.com/uploads/1/3/4/3/134343409/zokixabovunuwixariz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f90cbafa0d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f959ef87e2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8cf4923379c.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/xafaxotaful/libertarian_paternalism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f09512-073d-436f-a5c3-3b385278df6b/wugazunasamofoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/rosy_red_minnows_temperature.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/91949135690.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/free_download_english_book_for_bank_po_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/career_guidance_after_10th_and_12th.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/armando_perez_bridgeport_ct.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_off0000cf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF41 4892 bytes
SHA-256: aa18fac24218b102f535cc747a326dff8264262f2e890fdab594b2d59f1f52f4
font_01_sfnt_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 10840 bytes
SHA-256: 4105820e64fe703ab373058aeb17720c82e12f5ea11b7664fd5eebcd046543f6