Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e12f816ac4fe635…

MALICIOUS

PDF

44.7 KB Created: 2020-10-19 02:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d34792a282e4fd13961e8d89056a4b08 SHA-1: c34b48f0b94f3ebb15d3faad9daa0fe8b3d4bd92 SHA-256: 8e12f816ac4fe635be0f4eebee6c573b3d4dbb8341c8aaca169c822a6899979d
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://ggtraff.ru/123?keyword=manushyanu+oru+aamukham+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8cb0f84e331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f872da468708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8a96e83c3c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8c0a52ced9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f8a9df7c0dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f875bbc1c575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8707a9b0b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8cb65fb1e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8b141a8974d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8cb828d1e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f872df1bd85e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f88bbb81f97e.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/41defd1ee3.pdfIn PDF document text
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/8660767.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/fuzobavupol-relidow-xiragatudoj-vigomuxujem.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/tuxovi-diluvapurenotos.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/solunopopevuve.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/0d391c08-add9-4863-8720-372722d8f765/kobepazepugebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8b0d5c-5a4f-407f-b17e-efd96e984fb2/jaxevamisotunibizileduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b193d9-74a4-424a-85c8-230602332994/korn_freak_on_a_leash_mp3_320kbps_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b04665-d35f-464e-aedf-b155faa2340a/davodevopidivuwine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ee269d-2756-475c-8750-94e7d0db8d34/rorojenipimewenirujoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700d3916-9174-49f3-b163-839f87455c8e/zusolapovajivonepenipol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c62180f-1bb2-476a-a812-993c499778bb/fupororosaxinewumawej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac99f166-9152-406f-93f6-bd63d9cd4986/dadomewofafelurokolajeba.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_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 5544 bytes
SHA-256: 8c59492a75bb572f63d030db9275a380adf721be3a9c7a2e4b2240d5df0f4d06
font_01_sfnt_off00007b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B74 14872 bytes
SHA-256: bc447fc3185195813ecbed374254fd7cd13033b527c02b1dcd83fdc1547e5d96