Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5ccacf9a9b2411…

MALICIOUS

PDF

39.5 KB Created: 2020-10-05 05:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bdf97c5016249da1817c61c9202dec5a SHA-1: bfe2ed36ad024797a7df2b24b57b8f1bb363880e SHA-256: 1e5ccacf9a9b24113c7f7a96c8e4d22aab14d09da7e34ecd990abdf3ab19cf64
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://gettraff.ru/strik?keyword=physics+conservation+of+energy+worksheet In PDF document text
    • http://lupaw.villasianti.com/uploads/1/3/0/8/130874493/de298c35647.pdfIn PDF document text
    • http://files.encantobrazil.com/uploads/1/3/2/8/132814448/laxemekefevevetide.pdfIn PDF document text
    • http://files.crestwoodbaptist.com/uploads/1/3/0/9/130969991/mijekipodage-vonaf-wopukijibuliji.pdfIn PDF document text
    • http://files.lightseverydirection.com/uploads/1/3/0/8/130814349/wajeradujajibirox.pdfIn PDF document text
    • http://files.rosedalehorseshow.com/uploads/1/3/2/6/132682681/varino-nonukededu-jobob.pdfIn PDF document text
    • http://mubimeru.foxfamilyride.com/uploads/1/3/1/8/131857204/likukigozupuzemigeti.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/1/0499/1379/0622/files/south_range_high_school_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4011/8683/files/mcgraw_hill_connect_biology_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3366/0062/files/just_4_wheels_berlin_nj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2961/2709/files/inuyasha_demon_form_fanfiction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/lutapenovezuxixowit.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_off00005bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDD 5428 bytes
SHA-256: b8f08648a7a9cb05f6e5cc4147d8be5ab37868a2530dd7dca119df755dfc8238
font_01_sfnt_off00006e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E75 10088 bytes
SHA-256: dac7094cc96680b169891d7ef6d9aabc5f76be34bd3ed2e39c27c19dc4af9cbb