Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0be5ca5bf00a310…

MALICIOUS

PDF

45.4 KB Created: 2020-11-09 09:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4669b388dd4edf34d58a15cc148fb7eb SHA-1: 07aa435416e2b39eb00e177af55244cd71297286 SHA-256: f0be5ca5bf00a310224d572ffc4c3c141f0e65769c78b359153bcfe8aefef2ab
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=youtube+com+activate+google PDF link annotation
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/gidetufeza.pdfIn PDF document text
    • https://duzuxaxopukuka.weebly.com/uploads/1/3/4/6/134615532/4279002.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/410e7a63-33e2-4325-9eb2-1151ddcbf231/39475157829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e80934e-59aa-4447-9e0d-0942d1eb344b/centurylink_voicemail_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc1a0d9-5d1a-4529-9e17-f19bd873a044/how_old_is_a_7th_grader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0906b024-6fd6-47fc-b624-22632fc9d1c1/gepaxurivadivipesoxakow.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/soccer_heads_famobi.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/82036434080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5c5769-9c2a-4b88-ad34-03f0f05f5131/whiteshadows_nasty_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/atos_processuais_novo_cpc_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/moziligegakamik.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/golf_clash_club_stats.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_off000065ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 4780 bytes
SHA-256: 33c7d91f43e66f74db6fd02d4f03287825d5ed6edb40b8b5bf13281e6a286314
font_01_sfnt_off00007606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7606 10672 bytes
SHA-256: 45aa21045b8d7d47ccc91d1e65049185bac7f4632258f4d4783886339a99b98f
font_02_sfnt_off00009a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A93 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176