Malicious PDF — malware analysis report

Static analysis result for SHA-256 3969e5ba79d464d4…

MALICIOUS

PDF

46.4 KB Created: 2020-11-08 07:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09015c19b7cc46587d87644abde5e49c SHA-1: 72d2334650ef5a3da26e864b085cb070555df02d SHA-256: 3969e5ba79d464d4ca3df1461bca004316b16d368f6514d2076a90b84d9106f1
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://traffmen.ru/123?keyword=addons+for+minecraft+pe+mobile+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f8cf24ff23e3.pdfIn PDF document text
    • https://tilafiranude.weebly.com/uploads/1/3/4/3/134314128/mekekuvibumo.pdfIn PDF document text
    • https://sugosagugijew.weebly.com/uploads/1/3/4/5/134584769/xekipabomanekawofon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f93374bb893d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_5f9c7cdaf15eb.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/marimejerebo/87999275989.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/nissan_maxima_owners_manual_2009.pdfIn PDF document text
    • https://meniluw.files.wordpress.com/2020/11/lewexofiganekejeki.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/present_simple_spelling_rules_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/44408819018.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/causes_of_great_depression_apush.pdfIn PDF document text
    • https://lusiwelop.files.wordpress.com/2020/11/49420344242.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 5492 bytes
SHA-256: f5fdee34a09fc25f1c8b128e9866dbe25041f62d7c550716df97244dbdc1809e
font_01_sfnt_off000072b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B8 10596 bytes
SHA-256: 699388abd8cb9f8b09d252a64344a031936d2d82d688e54d5f4ba3a3b30f8e79
font_02_sfnt_off00009739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9739 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140