Malicious PDF — malware analysis report

Static analysis result for SHA-256 98752721e81bb3e7…

MALICIOUS

PDF

44.9 KB Created: 2020-11-05 22:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a57839494566d620e80c3b136ddd130d SHA-1: f9aea0f06c308714ce3afea80949fef9d10b6a7a SHA-256: 98752721e81bb3e73aace1af899c38cc558104c54861d4d148a41724ccc20fa3
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://traffine.ru/aws?keyword=2011+scion+tc+repair+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5fa27a2a622b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_5f922c111fa1c.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/3695017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5f9d700c28a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8ab1d7ba8db.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/puregawidare.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/vifexakifosujoju.pdfIn PDF document text
    • https://kumusexowefas.weebly.com/uploads/1/3/2/7/132741352/bavunumojej-vurozesisuved-xenonu-wativalivo.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/aad18303-2110-4ea3-84f8-4128460ce48d/74508130638.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/60643067901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3cb7fec-90e6-42c8-8978-39e77beb3be0/renotorudodajirukud.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/70264572913.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/iago_i_hate_the_moor_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/list_of_gazetted_holidays_2019_in_delhi_government.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_off000061b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 5416 bytes
SHA-256: 62afb5b7a79a82a0f0d88c40799eaa583320e81ea54343eab84680f9aa723802
font_01_sfnt_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 10796 bytes
SHA-256: 38f210a3ea40d2416a7cc0e15a1bf955878a9a1941a8facd3acf7f1b3f801ca9
font_02_sfnt_off000098bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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