Malicious PDF — malware analysis report

Static analysis result for SHA-256 db010c468bcd1857…

MALICIOUS

PDF

80.5 KB Created: 2021-03-01 22:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: df999948c8979e0d67dd08925e85805c SHA-1: c649060f92e08aefbc643f3ae1d758dacc186ef9 SHA-256: db010c468bcd18578bd1c902b0a98eec0de3e0e216c9e049b8e65109c3fac5a6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to trick users into downloading further malware. The document body, though heavily obfuscated, contains references to 'launchpad apk faded' and 'wkhtmltopdf', indicating a potential lure for application downloads.

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 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.
  • 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://pelibifir.ru/wix?keyword=launchpad+apk+faded PDF link annotation
    • http://zuwigef.22web.org/answers_in_genesis_science_confirms_the_bible.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/vixopopexomilokun.pdfIn PDF document text
    • http://lodijijewotiviw.iblogger.org/how_many_amps_does_an_air_compressor_draw.pdfIn PDF document text
    • http://dazinifuxevoji.22web.org/icd_10_pcs_coding_guidelines_2019.pdfIn PDF document text
    • http://zakukat.iblogger.org/baby_jackson_chameleon_care_sheet.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/vehicular_accident_report_sample_letter.pdfIn PDF document text
    • http://vuvepexuja.22web.org/landing_page_wordpress_templates_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/idicgi5/handelsblatt_nachrichten_aus_finanzen_wirtschaft_plus_politik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogulonogob.epizy.com/ng_dng_dashboard_reporting_trong_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/hero_wars_app_guide.pdfIn PDF document text
    • http://muwaziri.epizy.com/86118604062.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/91230667272.pdfIn PDF document text
    • http://tuzekejaxegis.epizy.com/85692569141.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/how_to_enter_cheats_in_gta_4_ballad_of_gay_tony.pdfIn PDF document text
    • http://komoxam.rf.gd/vijoxivexekij.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/kipepawimurusamasagowetuk.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/pukofuxam.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/what_is_the_difference_between_systematic_review_and_integrative_review.pdfIn PDF document text
    • http://vevojadiren.epizy.com/excel_quick_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 4940 bytes
SHA-256: 518d3d88eaa67ae9b5608ca7e2af27b641d4fb1018786bd09d4e25ba2888000b
font_01_sfnt_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 10400 bytes
SHA-256: bf87c5bb675372182d34df5a618766b14f4eaa4635eff1f1763a410de636a870
font_02_sfnt_off000110f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 21412 bytes
SHA-256: c844f31cb19d88d11c33b8476c053a25d1327abbe5a2ef3a9021734a09f63b1b