Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e440e009ca305a…

MALICIOUS

PDF

71.1 KB Created: 2021-02-24 09:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: abfcf947377f3e1c48d09eda906608e6 SHA-1: 0e6344609caf71fcc13d1f8a5f391c066d933e7b SHA-256: 81e440e009ca305a574e96e8970b42952577640d02c8ebb6e6be26971d5562a1
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=engineering+statistics+solution+manual PDF link annotation
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/meladozojitugemad.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/gghhDhg/kinotinuxokowiru.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/6342442.pdfIn PDF document text
    • https://cdn.sqhk.co/gizapakoni/pUuEja0/14890483836.pdfIn PDF document text
    • https://cdn.sqhk.co/pivatiwon/idgdhhC/22273581243.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/1133308.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/zinotukalonur_suzugaxi_fatew_sodoxaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/gbjjghz/mountain_bike_xtreme_2.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/1293569.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/kagedatabujo/d-_day_landings_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/kokegunivewimutatudol.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/factorio_bob_s_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/netherlands_visa_application_form_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/32637837418.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/nominative_functions_of_nouns_worksheet_grade_5.pdfIn PDF document text
    • http://tagitefidunun.epizy.com/acacia_auriculiformis_family.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/25788383822.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/whatsapp_app_new_version_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/38967106760.pdfIn PDF document text
    • http://wifavar.epizy.com/vavebeweru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82E 5176 bytes
SHA-256: 58ebeb33f3dc865ca6532e3ca308c123254c1170d15a78145545f658e16fa716
font_01_sfnt_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5076 bytes
SHA-256: 304f36ed2dbe4b1560c954d3c49192be71c1eb004f4d232686008134a043a712
font_02_sfnt_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 10496 bytes
SHA-256: 3e53c1c7c970edd01dc4cfdf165f9db82aa21487a417120f2b2e15dbee6d9a0f