Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b30ad8de7216c1…

MALICIOUS

PDF

57.3 KB Created: 2020-11-02 17:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d0363f304961471fbd5d45b6e58fcf83 SHA-1: 5d343a52986d73b8ebe0e44973e212b99b1b85ab SHA-256: 42b30ad8de7216c12d72254055eda3df9c5818a321a5cd9308949d68f9c3de0c
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/aws?keyword=1997+jeep+wrangler+tj+factory+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f9e3f1d150a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5f9de7ad1ef57.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009f4d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009f4d.bin)
    • https://cdn.shopify.com/s/files/1/0268/8290/0167/files/word_with_high_low_or_user_crossword.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6861/3308/files/53026661722.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/osteomyelitis_treatment_guidelines_idsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9272/8736/files/maxezuxopa.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/51599441983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3050/2312/files/dapujakal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3936/2719/files/biophysics_and_molecular_biology_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bc80a0-5c92-428e-9150-9c505273dcc4/63608891895.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/xofuregal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/kaspersky_internet_security_free_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/96664035838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7328/8869/files/apk_hungry_shark_evolution_hackeado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630e1c3b-8f85-4bd7-99fb-c4cde91e951f/81976584226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1066/8724/files/vutarasurojopigote.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 extracted file (font_00_sfnt_off00009f4d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4D 5856 bytes
SHA-256: dce4d0222d6757de19f272a24bc02562fcd426de5fa2213b3fd8dfe96386532d
font_01_sfnt_off0000b35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35C 10608 bytes
SHA-256: 52a07d1279ab083a748586dbe19480aec0db535d075130364210c4ed9bd7a958