Malicious PDF — malware analysis report

Static analysis result for SHA-256 932dfab3b4d4d8fc…

MALICIOUS

PDF

38.6 KB Created: 2020-10-03 00:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 59247ed084703f1b1849e2eb6c2ce1d2 SHA-1: 6cb116de586e9a49c70c923e8dfe4ce6516d0086 SHA-256: 932dfab3b4d4d8fc950e389646ee11bed8e524001c2f87e4baf168afdc4c8091
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://ggtraff.ru/strik?keyword=argonauts+of+the+western+pacific In PDF document text
    • http://files.drakeuniverse.com/uploads/1/3/0/9/130969079/e0bea7.pdfIn PDF document text
    • http://files.friendsofcountry.org/uploads/1/3/2/6/132695551/9228883.pdfIn PDF document text
    • http://files.websitesalestools.com/uploads/1/3/0/7/130740340/327530.pdfIn PDF document text
    • http://wemim.babylonreader.com/uploads/1/3/1/4/131453384/00221eb7.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/1/0433/4711/6191/files/memonam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3301/2635/files/rumakam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f986a199-9ac0-44de-b2eb-17c261b77f65/61411239146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b38a679-b881-4c53-91b2-b0d38677ef28/tiziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66bcfdc-4d27-4d18-a913-d98077518381/55928284456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af09f08a-1d57-4bc7-b4af-00ab4ecfc501/tumovulemawulamova.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_off000058f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F1 5324 bytes
SHA-256: 1046beb738f8a43a82c4ae38c90032799453f45e34c89b0f64ae81b2fa1f1c86
font_01_sfnt_off00006b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 10140 bytes
SHA-256: c4b122fd6891d0852145671e6d6e0d28bdd0d83d8765993927ab1b61f79cd78d