Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16cdbcc994a4e33…

MALICIOUS

PDF

72.6 KB Created: 2021-03-04 17:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 771cc36f55f656c7859a2a1852000760 SHA-1: 7377d3df2a03160ff7aba80ffdb13ea308fec947 SHA-256: a16cdbcc994a4e33b3c1bca5eeaf57b1afa79158b200ddfcc448f4e4b12939ce
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/wix?keyword=scaling+networks+v6+companion+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370528/normal_600cdf2a79165.pdfIn PDF document text
    • https://zejosawazir.weebly.com/uploads/1/3/1/8/131856185/6b1825f1.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/Xiigrji/vapipulivusemuvuz.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/eiaXghP/earth_wind_and_fire_september_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457857/normal_5fe8443d18a32.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/KzYq2jc/bubble_shooter_application_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/WhgIUjg/31573847386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_60307752eb27a.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/darolilazavorajezipitojeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5ff25da1d6079.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ShLjcjg/27333255252.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/7fa76005f525f7.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/OeiehjO/birofozatawixaduzaz.pdfIn PDF document text
    • https://murarukaxew.weebly.com/uploads/1/3/4/6/134666391/gopakuzodiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/eoijhje/camo_hunter_nutcracker.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/retobifulipo/youtube_how_to_write_a_novel_outline_wikihow.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/76955071988.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/hotel_del_luna_ost_flac.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/acls_test_questions_and_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/ccdc_5b_2010.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_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 5948 bytes
SHA-256: a695f01ce4e65d26a3f83c06cf9d2ca8492377c835dc10088c5cb4a1abe69451
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 10836 bytes
SHA-256: 13a1baa960df094832e820a042a271d637545da0b13ff8578db159180c53b449

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