Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ef816a4676d182…

MALICIOUS

PDF

63.3 KB Created: 2021-02-14 07:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dcb807564b6f9a266acfb5b733c3f326 SHA-1: 4e08f643f183a4db2d33c864891e61c771505927 SHA-256: 26ef816a4676d18239552fe717a936038199839d416f8a100d9ee83d7efe50fe
196 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
  • 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://bologen.ru/123?utm_term=jhu+dean%2527s+list+spring+2019 PDF link annotation
    • http://diwokaxojizo.iblogger.org/mumiwurojoretapur.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/bBheDU1/armchair_quarterback_podcast.pdfIn PDF document text
    • http://italia-doc.fun/kupojelivorutekete5qpv.pdfIn PDF document text
    • http://50offstore.pro/271640170357eq59.pdfIn PDF document text
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/gumipewatugemuk.pdfIn PDF document text
    • http://kataeta.club/gokixitvpzg8.pdfIn PDF document text
    • http://nagesebaz.iblogger.org/31323571118.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/dsAjijc/the_legacy_golf_club_henderson.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/sevoga/rigiziz.pdfIn PDF document text
    • http://tefagagegupavos.rf.gd/animal_kingdom_series_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/rixikatupapibomomafu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/lidojawutagujifosa.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/cheppave_chirugali_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/articles_of_confederation_vs_constitution_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/anabaptist_prayer_book.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_off0000b885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB885 5724 bytes
SHA-256: 4a02124ff1fa335046fa081db70dc422027b8c9143879039269a8d5189f2e499
font_01_sfnt_off0000cbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFE 10716 bytes
SHA-256: c152af0835ffe50ebcb1aecc3c4f0732ebdff8f2d05eec22cff4c8ef1b792639