Malicious PDF — malware analysis report

Static analysis result for SHA-256 3772c5847c8ba18c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 00:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2a2d36d5f675248d0609ace69c0c2cbd SHA-1: 670a4b545fe40b2c6059ff2c3e13b692a505c5b9 SHA-256: 3772c5847c8ba18cb23e6fa5e84b91410b06c6129857ed73f89c922b6e2f0ff3
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://ttraff.com/pify?keyword=coraggio+ben+mio+sheet+music In PDF document text
    • http://files.onpointbuildersinc.com/uploads/1/3/2/7/132712040/b9fd32.pdfIn PDF document text
    • http://tinelevot.thisdreamersrealities.com/uploads/1/3/1/3/131398140/kufegojaj_dewodavumikuw.pdfIn PDF document text
    • http://gomujowe.maxxxwar.com/uploads/1/3/1/4/131438379/2609ee305b6a4d.pdfIn PDF document text
    • http://girotilo.sciencefreaktion.com/uploads/1/3/1/6/131606289/dogitovil.pdfIn PDF document text
    • http://mewiroxoz.dexandra40.com/uploads/1/3/0/7/130775173/nudinipiriwulepop.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/1/0433/0687/7080/files/wogol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/pafejafefowoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/51528628069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/zobog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/14328658674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/xilunakikevavivozefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1231/7603/files/tusolasojujopabiruzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/design_thinking_stanford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/99102320729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/mejuxojuzewiwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4271/2221/files/catalogo_tecfil_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6953/2310/files/35827224533.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000504c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504C 5224 bytes
SHA-256: 3cd5e77e19c2874cd223a32d31ff9f1e509971a369d1359ef96726833b82ad46
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 10724 bytes
SHA-256: da3623653bac9ff1d510cb3040d06660f352ac7e97cdee7fae13a5cdae50c26e
font_02_sfnt_off00008541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8541 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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