Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a498b89142a371…

MALICIOUS

PDF

41.9 KB Created: 2020-10-30 03:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a31b1497a8216daaa57436a8cccae07c SHA-1: 57de9532aeefda09ca3411e16b5bf294a9465859 SHA-256: 15a498b89142a371049472fde947f050f652b81155ea93b9a4e6defbf1b6953a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=dometic+comfort+control+center+2+installation In PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/328851324217.pdfIn PDF document text
    • https://xigepeseforala.weebly.com/uploads/1/3/4/5/134508125/3a2808da98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f98edcccfc5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5f8fe61bcccb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005ae5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005ae5.bin)
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/proficiency_michigan_past_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2203/2308/files/paruporidajabogajizoxil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2456/6432/files/fulobulebuziwokopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975fcf8a-9973-4123-900c-989ee1fbd86e/ladofusirupuluxokum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988d8d7e-c171-403f-b174-134341fd2b45/82848274725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7219/9087/files/kofofikeruwala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e0df22-31f5-43c7-8eaa-327311e19442/48063806784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4947/2159/files/wifevalezakemadiwuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7713/0141/files/paul_mitchell_straightener_neuro_smooth.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_off00005ae5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5160 bytes
SHA-256: 4ffa04a539b9634f0a1357b4b8da24a74a0bcd73d55c4e3ba20682ac32176704
font_01_sfnt_off00006c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 13696 bytes
SHA-256: ff67d41960cad60fc8cf2659d34dbe0f2adb39661239ba85f6064a0c4f5d9b2a