Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ccebc2b73f6c81…

MALICIOUS

PDF

52.8 KB Created: 2020-11-07 02:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 39276f15c74401c1ad0e3728bdd7189b SHA-1: 6604a95b7a51157d38a8eb7e1f121c21f9087f7f SHA-256: e6ccebc2b73f6c816261c60a6df506b34963e69d249caf8bb3f8f5ef1954fd94
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=etymology+online+fern In PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/9726988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8cfee3ef74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f8e5d8ab29ad.pdfIn PDF document text
    • https://konibexik.weebly.com/uploads/1/3/4/5/134515119/bopikimewudifiz.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/girituxajut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8e469de3a01.pdfIn PDF document text
    • https://sumozizadux.weebly.com/uploads/1/3/4/2/134266097/7170eb85ad1deb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://gunefem.files.wordpress.com/2020/11/training_kit_querying_microsoft_sql_server_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/kamisigakuzaxumaliporun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc26a337-e994-4f9e-99bc-67ad1ee84233/43932570602.pdfIn PDF document text
    • https://rupaxil.files.wordpress.com/2020/11/mini_visual_boost_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/38973975118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71fea77-c246-494c-97cd-bb14e2c9c03b/sapevuxogujorovo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/masterbuilt_40_electric_smoker_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/xetokavugefikigid.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/joxiwidoxujatute.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 2888 bytes
SHA-256: c82bebd4b493aaaf84143f05ff6967641e6933e4069ecd51460b008fb5b9cf8a
font_01_sfnt_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 4760 bytes
SHA-256: 754f66d3400a4a44c1be93d451575c02a562de7507ba145042504534e2aedaec
font_02_sfnt_off000077a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 13508 bytes
SHA-256: 68fe685c197e2e6ccf60542d34bbea090788219b81c32131ee6324ab29bd7dcf
font_03_sfnt_off0000a20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA20D 16824 bytes
SHA-256: ab1d2b3570aec2710dc97d6455bd7a2773417d3ec5528a294e5cf5c6c3fac68a
font_04_sfnt_off0000b9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 2500 bytes
SHA-256: 18ab9527e71b7d0140e8ccc65736c6b95e58330c616ec805895a3ca93df9138b

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