Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fae67a5d0b1c72…

MALICIOUS

PDF

72.4 KB Created: 2021-03-08 16:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2285b0f68977c9d49866f52cab04e90d SHA-1: 4f1d0d1ffaaefdc16e55aead6561b965a68f1128 SHA-256: 99fae67a5d0b1c72cc1fde0aa4d7e1b6031787d14fdf632fe568e1097c2ee38d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=hk+dass+mathematical+physics+book+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fcac8e939d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_602b61c2c76ee.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/Khhihhi/light_me_up_inside_meaning.pdfIn PDF document text
    • https://solugukaxazazo.weebly.com/uploads/1/3/4/7/134748989/62f37.pdfIn PDF document text
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/5b70618fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_6021bbb3b5970.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/4c3ba.pdfIn PDF document text
    • https://zifekibovaliw.weebly.com/uploads/1/3/1/8/131871714/ribigawakatevopuneti.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/6PjitAy/cross_border_fee_europcar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_60023cdb03547.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/tyzWgdp/truth_or_dare_netflix_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/HlLE6id/guwusokifiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/ibhimXH/venabupogobaxisusele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/second_carnatic_war.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/37105958033.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/34036785399.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/kebudi.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/bivabirujoxaxegi.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_46ceb408238d4ad89a72b5d70912e815.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/dikimarasexutir.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_6bf0cb312376490a960699dbfd78c873.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/anti_malware_cleaner_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/jifivaxomeduxonarurefaf.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_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 5756 bytes
SHA-256: 9e01d51cd72c636028677dc532494505d95ace29e80977ac311b6a2acb5ce5cb
font_01_sfnt_off0000f032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 10392 bytes
SHA-256: 6a35755d2ac5831c0d3db5d36e1fa31ac0cf6a224c16e3b59a8e9771f7307ee2

Open this report in the interactive analyzer, or submit your own file for analysis.