Malicious PDF — malware analysis report

Static analysis result for SHA-256 e718d597be92a4d7…

MALICIOUS

PDF

37.4 KB Created: 2020-08-23 09:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c2342b063ba4c5e48adb1a9b918b619e SHA-1: b91a2eb89d37d068a5030c31aec75a186b710f04 SHA-256: e718d597be92a4d74a7af379d78b39540b95ae56b6720feba8421dd9a8aaf5c8
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.com/pify?keyword=chota+bheem+damyaan+tamil+movie In PDF document text
    • http://files.freedomryder.com/uploads/1/3/1/4/131409305/tinuninab_jokavu_zapatuberuzer.pdfIn PDF document text
    • http://files.onelooksalon.com/uploads/1/3/0/8/130874620/bitizupufegop.pdfIn PDF document text
    • http://pupafaxu.evergreenmeditations.org/uploads/1/3/0/7/130776485/nolididoriziti_winumiza_wevejo_vogejurufizaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/academic_writing_from_paragraph_to_essay_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/glencoe_physical_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/vikufitamiledaxuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/estimation_and_costing_by_dutta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/tefagifofawefuxogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/moluvuzapofesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/3407968886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6847/9901/files/sonar._coverage._jacoco._xmlreportpaths_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/voltage_divider_and_current_divider_rule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/40500429744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/woxituxinikewin.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_off000054e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2 4996 bytes
SHA-256: 18f1b29ebea2410dc482160c529a760b4823efe12b071059e147a58798f2ccae
font_01_sfnt_off000065ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CE 10240 bytes
SHA-256: 2ae9ca75bcac0cd14b62f6747712d1a2593b3dac89e2e537278e2219d2172b1c

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