Malicious PDF — malware analysis report

Static analysis result for SHA-256 073128009ec4d797…

MALICIOUS

PDF

38.9 KB Created: 2020-10-05 22:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4c543f28c7f5b471a8ab491c6d754c1e SHA-1: e2199a3da2cd5cdf714a8fad2867aea2261fb6b2 SHA-256: 073128009ec4d797c5680078ed88ca26b8516493a8ed6612d976448ffeac6fe1
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://cctraff.ru/strik?keyword=stanley+fatmax+knife+manual In PDF document text
    • http://files.chipperfieldjazz.com/uploads/1/3/1/1/131164199/pugusupuxexopilo.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/1/0499/1480/6440/files/67337024574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/73819301120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1379/0622/files/hcpss_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5639/files/cantu_leave_in_conditioner_spray.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3912/4377/files/does_nyquil_severe_keep_you_awake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5399/2086/files/unilever_free_samples_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8327/0818/files/kedimaxetadetit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d101ac4-0889-4d50-b0ae-0371a678af3a/64300516297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25aebf93-e7a8-4b82-836d-dbeeee7f7b4e/kodapawigewipotaxok.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_off00005224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5224 4976 bytes
SHA-256: 26f4f14cf97e88f3feb682f1d0fdb0d771d7595b16340afbc1a8d7d4eece1ef7
font_01_sfnt_off00006316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 14212 bytes
SHA-256: a4147100aa537a5445992578e113a3f13ed1e6fe4c3cb28322ee88607759c790