Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a9f948701e01c2…

MALICIOUS

PDF

44.9 KB Created: 2020-10-30 02:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fdc4028b7d1b0f403ed4b9518abc87b2 SHA-1: ef504d4674cfaa5810c1cd08fb46317c8157e917 SHA-256: 22a9f948701e01c216d83c5c3406223d66d06697e743436cb74cad197fef1ef4
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=reasons+for+jesus+youtube In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/diwawekorun_fitekebekulepa.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/1537d457a95e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f8a0e39b29b9.pdfIn PDF document text
    • https://berotejenikakoz.weebly.com/uploads/1/3/0/7/130775756/seleviwifaguvu-lajejidabaka.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/zudoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f8bbd6f3da30.pdfIn PDF document text
    • https://gexeperi.weebly.com/uploads/1/3/4/3/134348656/poselek-xirazaf-gatevux.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000070e3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000070e3.bin)
    • https://s3.amazonaws.com/zevutebulaworel/datasheet_78l05.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c63617-bfd3-40f3-b0ee-b74bbae09c99/bolisotulawuzoxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0218/0006/files/because_he_lives_hymnal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7731/3713/files/chicken_invaders_2_xmas_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/activated_carbon_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/36628380932.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/amazon_cloud_reader_to.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_off000070e3.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 5052 bytes
SHA-256: 6122132edfb7666b792f6689ee928df957937595f9aa1582a4730df7ffe90490
font_01_sfnt_off00008233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 10716 bytes
SHA-256: 7e41f86146d6f714abd21418e9c7f994c8f021a68ccf8f1be134cd12ed0ae4c6