Malicious PDF — malware analysis report

Static analysis result for SHA-256 44407f7dcb47b353…

MALICIOUS

PDF

45.6 KB Created: 2020-11-09 03:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 57813005b0b756eec34396991f03f81a SHA-1: 8be5767e679765478c4c45acef642fc995a99ed1 SHA-256: 44407f7dcb47b35334a48f956bdde44d43d7ab9360be09147cbfe3167ab22738
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://traffine.ru/aws?keyword=takagi+tankless+water+heater+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f9a6da765082.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/40c1e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fa87c5219edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f8b32d647715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f91a0bcc77af.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/83b1afc801ca55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f8c88d95a830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8c7b7e251e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fa493990f288.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/4471d7aa98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davubewu/calendar_week_wise_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/35196039050.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/2244876823.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bonded_labour.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_off00007287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7287 5376 bytes
SHA-256: 1e4e2969b98076d4ed811441a8a8c953180a859e7b957c7a6ccedfe641c7195d
font_01_sfnt_off000084c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 10708 bytes
SHA-256: 50fdb9d0544821aa1c7cca8534b18a19147da466d6997973fbe8680dfe4a171d