Malicious PDF — malware analysis report

Static analysis result for SHA-256 d567bc2ab1d7b067…

MALICIOUS

PDF

43.8 KB Created: 2020-10-25 05:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6e62e78a05c260fa60f8432e1836409e SHA-1: c7807bdf8637b25c89adee88f203c82309117b29 SHA-256: d567bc2ab1d7b067691e4652030dcb2f1a4eb5407aef62c07bbc87391acc46a1
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/123?keyword=arteria+cerebral+media+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8d41457ce95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f905ddb16274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f912065c22df.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/9f3d0.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/gowujetemadivax-fakobobimiraba.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://busiwilepajij.weebly.com/uploads/1/3/4/3/134353274/7d5d8b3ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f925729b312e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8a563f61c22.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/falufusu/zizuwumaw.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ayatoul_koursiyou.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/41686560224.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/geometrical_figures_in_engineering_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/14910105159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0808/5149/files/essentials_of_accounting_breitner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4579/5493/files/newman_hall_uiuc_floor_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9481/1836/files/cross_country_terms_and_conditions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/moxumupifipefakiganu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0744/6687/files/the_enron_scandal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3885/5327/files/laxaropufupobamawexal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/rekilezivag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/ar_guided_reading_level_conversion_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9792/1975/files/comptia_pentest_certification_all-in-one_exam_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2410/5115/files/non_verbal_communication_techniques.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_off00006c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 5252 bytes
SHA-256: edf084aad41a658da852ecae3b74722b42f2bd88117ee0dabca38795bca892ba
font_01_sfnt_off00007e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E30 10712 bytes
SHA-256: c4e4819f1bab434955a8bd43713929b73db7b3c267001f0c424c7a7548ab7c74