Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62681b9bbd02823…

MALICIOUS

PDF

40.3 KB Created: 2020-11-01 05:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 901f84c3f558d0fe3867813ad8635d27 SHA-1: 2857dc1d724234fe768e78ef0830f2ae61e62f92 SHA-256: b62681b9bbd028236b7cb8df6df7c692788c3bf1e6469017d3e6fa48dde4cfce
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=justin+bieber+download+love+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f9724fe71dd5.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/4416828.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/4048320.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/c22fd1.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/lupopitimeluvizonog.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/niferam_ketoxudegofiwid_gosew_metebagedop.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/bubisifapagefe/biodata_for_marriage_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/jadiboso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ae7473-865e-4615-9e70-528352e95ef1/second_grade_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a13856-eb0c-4680-b101-f4411ac6c144/504651700.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/healthy_smoothie_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62511dd5-d459-48cb-abdd-efae4b1f0216/23217060582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49394ed-567b-45e5-ac99-09d3a83733ae/core_competence_of_the_corporation.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/nudijozowiripakutojedopex.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_off00005fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 5252 bytes
SHA-256: 6878190abe67d0dbd220b723bc504b51a73ce20086c3652f844ae7b8f352e909
font_01_sfnt_off0000719a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719A 10288 bytes
SHA-256: 1dcdb31f77b11c8e09165e8927ebd58b0189baeca69fc82e3830e4c831fd110d

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