Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27e4bf317707c48…

MALICIOUS

PDF

40.6 KB Created: 2020-10-16 16:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 08f51388ba20c64b0a841b98211e9494 SHA-1: be04f6bc70996d19405f71dea4f287a9f21eaaec SHA-256: b27e4bf317707c48e5a3e67d98daa4b8b2112f795d205b8f748c239cf8edb541
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=mondelli+dentistica+operatoria+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f877d5a1af6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f88a38fb1fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f8759771aa92.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/jokenidapime.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/9e8409928.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/wurogopijeza.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/pupapefujeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfe4aae-4796-49de-b9f9-1cb6048466c1/22253217366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e897940-7de6-48d8-9e48-507a653e0bf3/50382356130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2fdaed-9d87-4eaa-8368-4a5cea3cb58a/sogesofuferaxidam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/star_girl_christmas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2453/4680/files/kafosisozuratajotaralep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6886/7231/files/the_phantom_tollbooth_quiz_time_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/3074/8824/files/clinical_match_me_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3710/0694/files/dubojijira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0911/6840/files/anatomy_and_physiology_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/side_exit_exhaust_f150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7757/5855/files/benign_prostatic_hyperplasia_treatment_guidelines_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4105/7687/files/where_to_find_lead_in_subnautica_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/68904615784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/woodlands_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9485/8133/files/lenamozenamidal.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_off0000615b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 5156 bytes
SHA-256: 4c594f01276226ad3661734a4e771b361b262d87f8159c29ab0b3ea34819330a
font_01_sfnt_off000072fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 9988 bytes
SHA-256: 937df8eba7e47db60b9e110c7403f42207576906693e487f37d7cbb912c01cb3

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