Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede8250f3fc8b2e7…

MALICIOUS

PDF

66.1 KB Created: 2021-02-17 03:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2bce7802fe4881a9ab4df61c535348fc SHA-1: 538553b45dc8ad3e0856b25236fc91fce81aef7e SHA-256: ede8250f3fc8b2e70c4d46e5cf60718d6ebf7669d494ab069d46597c5d1a8538
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://crophysi.ru/wix?keyword=birthdays+this+weekend In PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/gaxedo_dupekenu.pdfIn PDF document text
    • http://helpcopyright-service.com/java.lang.noclassdeffounderror_com_android_sdklib_repository_sdk_repo_constantsicpf8.pdfIn PDF document text
    • http://train-home.ru/adios_nonino_partitura_pianohs81x.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/zelisisasivikokeba.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/1wQBeK6/12669059135.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hujhhdD/aesthetic_fall_backgrounds_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/ewhijdv/test_computer_virus_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rirerujel/dg7Uhd7/umc_hospital_er_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/ifrtu3g/67695245386.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/basketball_world_cup_game7j38c.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/yiegggf/nisoxetodatamagema.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/55289.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/vabemavuputenif/5996657027.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/fagaxuxisonumovugadixip.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/3973925210.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_off0000c6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AF 5188 bytes
SHA-256: 8545253124ec9e5c491583bc02a11836d16b3168b1524131f1f0f2660c82af7e
font_01_sfnt_off0000d867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 10440 bytes
SHA-256: c29d3bcb00f7d2b4b467df25a32fa9c8144c908f9bae24f37f9a09e2e3cd8d11