Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bec051df4829fef…

MALICIOUS

PDF

42.9 KB Created: 2020-10-10 13:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4523dfa5bff94287bef78830c51e670d SHA-1: b2f5ed25490aec137e6433117fdcb63ee7ae70b7 SHA-256: 6bec051df4829fef9e2c21fc1ceabc77209b7d52b439846499445ae61b8f2a0f
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://ggtraff.ru/pify?keyword=cuttlefish+kings+of+camouflage+worksheet+answers In PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/jojil.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/40780464824.pdfIn PDF document text
    • https://site-1039494.mozfiles.com/files/1039494/34035289414.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/nukemexarexet.pdfIn PDF document text
    • http://midokerab.kennedylayne.com/uploads/1/3/1/4/131482851/lobagotet.pdfIn PDF document text
    • http://tixesozol.rn-photo.com/uploads/1/3/1/6/131636612/1d3fb434.pdfIn PDF document text
    • http://files.rampcheckglobal.com/uploads/1/3/1/4/131453214/vibajagi.pdfIn PDF document text
    • http://files.parkviewfortpierce.com/uploads/1/3/0/9/130969238/mifedenirami-sulewora-rafisawenagi-vimivozuwaxe.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/1/0431/5486/6333/files/ffxiv_2.0_relic_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/iron_man_mark_78.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/tezuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/twenty_one_pilots_the_judge_roblox_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7230/2503/files/tojebadinetelatub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3669/9555/files/43558801279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/17782029099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4143/6060/files/final_draft_4_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8566/3908/files/divinity_original_sin_2_shadowblade_build_fextralife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9977/8967/files/nupodogofovuveluwa.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_off0000687b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 5356 bytes
SHA-256: ed91abf27f0ab1b73996f428757bab85ce31793bdcb1094a5d36f92993a30837
font_01_sfnt_off00007a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 9900 bytes
SHA-256: 5c7a468b17adc03d129cca74c354a8355357e6ac1a1c1a674dd2b0d8e3756aab

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