Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2605ecbe244b4f…

MALICIOUS

PDF

53.7 KB Created: 2020-10-16 07:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c7364599902432b68d4c5de75dc565b3 SHA-1: ecc1acd3b5d53f6dabf80f2be7dc147352ebd69f SHA-256: 2a2605ecbe244b4f249ab65de900dbe5a1e4829360a511bcc664513d4641a68e
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/strik?keyword=cisco+virl+installation+guide In PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/2472351.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f883f18ed6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f870be52d658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f88dbb6e498c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f879f1936ccc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/22b9772e-d7cb-4bf3-b238-fa5947b1fb6c/81603951635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830b7d85-f533-4b94-9f29-707eca7e9407/18610461097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ee2ef5-8450-4470-90f9-ff2d480a4faa/88792278159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8316fc-9d73-4f8c-a716-fe0b8f98ecb1/tafipuxugabumimuluvat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ebff5b-ee45-473c-b5ec-52f9f55712f9/zavevatezojiladanug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4936/9759/files/muxefowugusekuran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9548/8680/files/true_lives_of_the_fabulous_killjoys_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/28477889957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7631/1447/files/96229855140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9849/9997/files/que_es_las_sucesiones_en_iniciales.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000867d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867D 5072 bytes
SHA-256: 70b40baebb3507f6cf8823cf5970a1f01acbf77caac829f49b030eb26ae823e5
font_01_sfnt_off000097cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CB 10444 bytes
SHA-256: c7d8b1ea50770f632de1e82ef34a4e33882ade13780bee1a1d33773d04949f2f
font_02_sfnt_off0000bb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB97 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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