Malicious PDF — malware analysis report

Static analysis result for SHA-256 631a74b86246f87c…

MALICIOUS

PDF

67.5 KB Created: 2021-02-19 07:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: efb15b66bafb30851c76570c7fc94d17 SHA-1: 9682042ddbfcac80ace5b0b57f76601ae144ec59 SHA-256: 631a74b86246f87c8edfdd7211c07a89922c6716dc8e93f4622bdebda24073b8
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=prc.gov.ph+result+2019 PDF link annotation
    • http://apsdd54gfv.xyz/jogos_para_nintendo_switchoshya.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/350jhic/detonemowolisebatudade.pdfIn PDF document text
    • http://romeital.space/posotaxew7vil.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jidYmhh/benny_rabbit_adventure_world.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/UDcrhbp/zopagewelavivoxelolaxula.pdfIn PDF document text
    • https://mipupupomekux.weebly.com/uploads/1/3/2/7/132712043/4432921.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/Shbhjhf/download_game_maker_studio_for_windows_xp.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/5096664.pdfIn PDF document text
    • http://healsmall.space/erasmus_darwin_academy_uniformxtzo0.pdfIn PDF document text
    • http://j3vnci4.xyz/manual_antibioticos_usp862ev.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/kutiwujavifexejeme.pdfIn PDF document text
    • http://curvepreloved.com/rituletezonopovezeriwixx1gk.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/pafiganovavi/dejajuzuvivixuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/eliminators_datasheet_40k.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/vipimevakubodudeviko.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/what_questions_to_ask_a_girl_in_arranged_marriage_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/kigegodan.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/78912806460.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/altura_uterina_en_el_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/mafoganebalovebevux.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/wekimalevajagilopas.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/lesiones_del_nervio_vago.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_off0000cc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC56 5560 bytes
SHA-256: de17ea3c4967da1fef77b0895a0ed80e8adddb90b2fb0c6358213722bc931ca8
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 9804 bytes
SHA-256: 7f3390e90af641487265cbf950f4c69fa5901c3bc5ba525bb4b424e33af3072d

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