Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1f788b7aa61d0d…

MALICIOUS

PDF

42.0 KB Created: 2020-10-08 10:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 963d58bc314362e21d6c39870378e234 SHA-1: 3a53620a228c5b5e5fd702326f5ee5fc8cc21d28 SHA-256: 6f1f788b7aa61d0d9976632f07be86323c25b0eee58a6128a8b278b5122e1230
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=understanding+public+policy+14th+edition+pdf In PDF document text
    • http://files.communityplayerstucson.org/uploads/1/3/0/8/130813134/6603057.pdfIn PDF document text
    • http://files.memoryblocks.ca/uploads/1/3/1/3/131381850/67bf2.pdfIn PDF document text
    • http://files.atllead.com/uploads/1/3/1/6/131606758/refoligizanoj.pdfIn PDF document text
    • http://mezobel.mifitnesslife.com.au/uploads/1/3/1/6/131606186/mudamiga.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/1/0432/7879/4920/files/harford_heights_elementary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/dieta_del_metabolismo_acelerado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7001/6673/files/89440450287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1732/4712/files/wifi_bruteforce_apk_no_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5835/9193/files/short_words_with_c_in_them.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/nivagoxusabimif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6443/3061/files/56476883035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/befux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e85f25-3f6e-4c29-b905-8916f43aa73e/21690873765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3df40ea-da8d-4882-ae34-8369f1ab69ee/kevezirinin.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_off00006554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6554 5792 bytes
SHA-256: f249151187439ce7136d2e629d46915f60424fff9f4363919e64ab02ae56cc2b
font_01_sfnt_off00007913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 9988 bytes
SHA-256: 9d83d597b23739030501e9346caa074129d4d4b78c5031c558cdfff22dd734e4

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