Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bc133bec7ddc8e…

MALICIOUS

PDF

40.3 KB Created: 2020-10-16 09:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ec8616f6d94b61cfef8a2bed8af11c04 SHA-1: 40de8f51109cfefe42dc8d3cf98a764e67104b96 SHA-256: 62bc133bec7ddc8edbda4d1f109c8f58dc614f7d532e38c14d0ebf4e52cd4f8a
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=swanson+speed+square+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f88c5b06e12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f871a1b50f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f88b7b309263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f87438ae46c3.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/roronositofasu-kajareburawor-xujafaku.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/godikiboli-takugeze.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/petekabuge.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/tedinoruline-luwukane-fidigu-xivukavikabikiv.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/letiw.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/1/0431/9015/7474/files/mizanigipiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9218/4740/files/7984635854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3160/0538/files/moses_father_in_law_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/7762715949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6835/3431/files/18366173534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5ba6a4-6220-4f40-af67-3b3eb5b2790f/31022378351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a798745-23b7-4e2d-8b87-63edc0b1aaae/falafetibiteve.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_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 5424 bytes
SHA-256: 848feae21c084dddc17fe70d9869ce57462a4ebda5f36f47031ba3bcc205a2ab
font_01_sfnt_off00007188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7188 10244 bytes
SHA-256: 8fd711e073711c72e9bcef3df5de78981823cff49f5e7e88de1fb8d49316d146

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