Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09e5ea040f3d67d…

MALICIOUS

PDF

53.0 KB Created: 2020-10-05 07:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4b2f2da8ce05138e1d00ec74712db2ba SHA-1: e1feb2ba2b912ed0efc592772c01389f2d209e3f SHA-256: d09e5ea040f3d67d86a430ef7058a35b4108d8153d26ea51940fe824d449ec6c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://ggtraff.ru/strik?keyword=android+studio+build.gradle+signingconfigs In PDF document text
    • http://files.cowboyjamboreemagazine.com/uploads/1/3/0/7/130740589/gosogepo.pdfIn PDF document text
    • http://files.project541.org/uploads/1/3/0/9/130969153/5471d4397b7a.pdfIn PDF document text
    • http://files.salondivinenj.com/uploads/1/3/2/7/132712483/gomuzesozuminabude.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/1/0435/2940/4567/files/small_country_that_starts_with_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3319/4396/files/stomp_brothers_johnson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4191/0695/files/sevewozidigatowela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac264d6-af11-458c-8335-205ea3b17f30/mavitemimimepuwefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62473539-beaf-410a-84f9-7ba326057a79/98746470006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127cb7c2-01ed-47ea-b705-972658788c93/8055384160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e522480-9325-41f8-ac0a-28d9b5398a37/74508560686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b52a36-d407-43bc-b192-48984bf70bbc/jivikidajagidofojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd10f9d-666b-4906-93a7-db4142eab914/89852858909.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_off000089ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BA 5352 bytes
SHA-256: dce4249c12ae53640e29b5401660698c77c5b35d96bd126d5302bcae79408eb5
font_01_sfnt_off00009bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 13232 bytes
SHA-256: 5c70cba9f600e72da2531cedd01d09089fa15e80220be2c5fea5072eaf5eca05

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