Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e5450d88ea1d63…

MALICIOUS

PDF

34.2 KB Created: 2020-11-06 11:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 9fbc82e2abb040da3616adf3e77e6ce8 SHA-1: c08d4f0751eed90b6970332813ad505de58891bf SHA-256: b1e5450d88ea1d6300e295808f3a73637f5676c419fc56280351ab6ead855260
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://traffmen.ru/123?keyword=cracked+spotify+apk+reddit In PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/gitetomuvi_toleko_gerusiletufal_lineredigawutog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f95e46f6a432.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/5283738.pdfIn PDF document text
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/levujojaburox-folag.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/wexoteluwag/did_jesus_have_a_brother_named_craig.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/83709935846.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/56154038554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810dc2f7-c4aa-474d-bdb1-ddc21432ff62/fodiderifoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e1caa8-6f7d-458c-a7a9-2759517b43f0/jeep_key_fob_programmer.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/bring_the_soul.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/tera_bamarama_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19adf68-ba10-4796-894d-d4ad7fde8594/muzavukufudemixubokodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17387f30-3def-4d54-bcfa-725c5fea0714/68438582677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7100bcb9-e44e-4c12-8d76-1197f0fa23a5/jofusu.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_off000049c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C0 5188 bytes
SHA-256: 292eeaaa62f5d32c74d4e19ac332f473b9ba6ad7ad9286756abd8b6df6e86d5a
font_01_sfnt_off00005b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 9576 bytes
SHA-256: d60247d3328ca18acccc34002fcf3cda480e4aef4a24ef8b884fa7b97d980bf5

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