Malicious PDF — malware analysis report

Static analysis result for SHA-256 792b65bfcda4b7e5…

MALICIOUS

PDF

70.9 KB Created: 2021-02-20 03:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bf32ee23880c09c9974ac1f520a4b52e SHA-1: 9fc4d374e807665cd7c9df3b39b43c50c9097f62 SHA-256: 792b65bfcda4b7e5484871dc9633b30f834553605482b6c09ce53049a877b877
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=find+the+hidden+element+worksheet+answers PDF link annotation
    • http://selozufuwadapuw.66ghz.com/barsaat_ki_raat_old_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_5ff95804d3a90.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/girajinilex.pdfIn PDF document text
    • https://walugudosesex.weebly.com/uploads/1/3/4/6/134608180/latixatevimulep.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/29779f45d41a7.pdfIn PDF document text
    • http://jijukilodo.iblogger.org/cbse_board_class_12_biology_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fd72932bac79.pdfIn PDF document text
    • https://ronaleju.weebly.com/uploads/1/3/1/4/131482819/wibivajinakoref.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/1d3d216175d66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekolaxoretewov.epizy.com/everytime_britney_spears_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/abrsm_piano_grade_1_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/sorting_polygons_worksheet_grade_3.pdfIn PDF document text
    • http://kapivuvarebe.rf.gd/volume_booster_sound_equalizer_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/chromecast_for_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/80516777720.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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 5176 bytes
SHA-256: a12a0b0f37baef2edc9fdf72d03379438e81d2cec97aec258ebbdbff6a81b55d
font_01_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 10492 bytes
SHA-256: e4e7d3195309feb402758336b030e64e5c228d0eecab2e63ab042efa37966708

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