Malicious PDF — malware analysis report

Static analysis result for SHA-256 62aaa7ef1da49587…

MALICIOUS

PDF

62.4 KB Created: 2020-10-14 22:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b60928249859b77f9a60b0f49ca0d703 SHA-1: deed9513d62810754927572617870517280d63e5 SHA-256: 62aaa7ef1da49587ad748712ef17fde42571d81ee2a8b70a271b6092c268b74d
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://gettraff.ru/123?keyword=system+shock+2+stats+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f87406ad8786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f87421596ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8702d4eaddc.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/eff1201bb52d3b.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/1914336.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/tomefibejoguzipif.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/juxiv_walonase_mijezepare_juleb.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/6c71955787.pdfIn PDF document text
    • https://site-1039570.mozfiles.com/files/1039570/jenogupux.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/80566268575.pdfIn PDF document text
    • https://site-1045331.mozfiles.com/files/1045331/kefivawitorekunufuximuz.pdfIn PDF document text
    • https://site-1039735.mozfiles.com/files/1039735/sujagejowasotataluvufitof.pdfIn PDF document text
    • https://site-1040140.mozfiles.com/files/1040140/71116429760.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/1/0497/3513/9482/files/89197478017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6080/4770/files/tivosebutir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4627/2663/files/lovakengj_house_favor_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5227/7155/files/vinonafirinefobeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5185/8088/files/wojukerufis.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_off0000b496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB496 5628 bytes
SHA-256: f4aadcfcf4327eab2cd3ff3a08ff3d707e133fc23e3293d423bc3ed96f06bd8c
font_01_sfnt_off0000c7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A3 10684 bytes
SHA-256: 8fe02dd2e672e7815865eb63d9710fe71573bf0c8362eb5d212ec9cc79e2ddfe

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