Malicious PDF — malware analysis report

Static analysis result for SHA-256 703e700cc6c70917…

MALICIOUS

PDF

67.2 KB Created: 2020-08-24 02:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f64ddfa2e539b3999ecca45f944c2651 SHA-1: 28f98af67a38da4787ca3f2871ae17eb0fdc3e42 SHA-256: 703e700cc6c70917267aeb869c05fd99b953824ccc6edec76c32a69b457bb195
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.ru/pify?keyword=edudel+date+sheet+2020+class+12 In PDF document text
    • http://renubom.mogooch.com/uploads/1/3/0/7/130739140/200b488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6230/3637/files/go_math_6th_grade_practice_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/biriyani_movie_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/povomalikezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0676/0856/files/bebomezofirijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/zupakafodebilimikiriwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2784/9639/files/puppy_vaccination_guide_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/mezipujofowimosew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/dr_dre_xxplosive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4285/files/kikim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/arthur_schopenhauer_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/blacksad_trke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/xupuzim.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_off0000a70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70D 5212 bytes
SHA-256: 6d4816dfcfba74a515c469bd97e71453e77b9ea9a194018c34c4e9b36747e17c
font_01_sfnt_off0000b8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C3 17024 bytes
SHA-256: 2d8f8e696cd89fdc0b121f85c1de4336bb63f96e1ac3b5d0d217f225d3c8e69b
font_02_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 4420 bytes
SHA-256: 64786a94706fc5d716c34055f90f2cebe617f52d4247e9fc28e9b7ee86c4cdfa

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