Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3cb3277a04454d…

MALICIOUS

PDF

34.8 KB Created: 2020-10-22 22:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 615c6b85869ef896ab2531f24cfd0130 SHA-1: 4fe7715ced2c83e6914842583400c97b0a752bb5 SHA-256: bb3cb3277a04454d73aa5d3766bf587887378c27757856642be63e25c6274015
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/pify?keyword=distributed+dbms+book+pdf In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/nubagovovu-wanapudusawok-tizire.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/magejivuzove-repej-bewozemosodisor.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/xobavo_wofixob.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/javimokudafaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8b6692203f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f89cad0ae457.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/lezifunudovusowow.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/f9bdba75feb7db.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/1/0500/5328/4008/files/rilurolediteniwelax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6344/3101/files/21215229647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6162/3963/files/environmental_ethics_and_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/super_mario_game_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2647/5929/files/scan_n_cut_blade_adjustment_area.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/17333078080.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bromberger_blutsonntag.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/statistical_learning_with_python.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/cancionero_de_baladas_para_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/29513339835.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_off00004c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2B 5148 bytes
SHA-256: ad07ddf71f4a3502035a1f8be0a12de8a35fc4c7ff115bc7734e70988dd33635
font_01_sfnt_off00005d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D92 9512 bytes
SHA-256: 7ea63777aacbdc697fbbb594ab9aebf534d430aa476e95f402ea64bc0fc9a250