Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef61a51afeafcc0…

MALICIOUS

PDF

68.3 KB Created: 2020-12-15 12:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: de3a8fbce03c28c76ce9882320c8fdc6 SHA-1: 859379fa3d6937a98dbca42a0dcab76ac9a6c069 SHA-256: 7ef61a51afeafcc09db80c63ccd9b2e1a14c204ddd65c5e32caea83522eadd18
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffmen.ru/aws?utm_term=aruba+switch+2530+configuration+guide In PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/tifukulikud.pdfIn PDF document text
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/vunitavod.pdfIn PDF document text
    • https://mosunenipotope.weebly.com/uploads/1/3/4/7/134767451/fa742bc.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/jegigexekadejew-revifimidixewo-faxasugo-botenefikajid.pdfIn PDF document text
    • https://mufobaxepomek.weebly.com/uploads/1/3/4/8/134866816/9d97718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc553bcab79f442f246f04a/t/5fc8b2447ff5a343ebfb6991/1606988356614/70004730930.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bce8a13a450bab05ef87/t/5fcdb02b33187724c40f529a/1607315499917/flying_jatt_ka_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/3039408228.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/lady_dai_banner.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe12089b1ed03538a26d10/1606291981025/noweregoxebujiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f48bdb33045eee0080d/t/5fcb597e9708706f3999f0f8/1607162239562/umc_el_paso_tx_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a84b7a9-c805-4847-bc93-0291fbfbab1a/team_mom_introduction_letter_to_parents.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b829cd1e280355f52c70/t/5fd1c0bf8ba64b78df553020/1607581887869/nitro_rc_cars_store_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a03e6d49a06bb8a53c6/1606380039490/evangelio_de_felipe_gnosis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceeef1491241adc443a46/1606217455045/susetudipofatumubuvefagox.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_off0000ca03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA03 6036 bytes
SHA-256: 4b94fcb5a7015c51f37122d24d4aa01afe54da2eaeb111f1982779872884cab8
font_01_sfnt_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 11120 bytes
SHA-256: 264e615f76b9e87062786c3cfca2134234a60eb9eefe019aea62b529b1df1900

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