Malicious PDF — malware analysis report

Static analysis result for SHA-256 b677a87d307ce6c8…

MALICIOUS

PDF

75.7 KB Created: 2021-01-21 00:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 20b2ad82c822b0587cf43df60b081245 SHA-1: 150dc4144695f0f36b0d79948553a36850cc88fe SHA-256: b677a87d307ce6c8eb4dd3cba89594745b81fb4681e75b33686c305cb6c1ad95
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/wb?keyword=wwe%20smackdown%20live%20results%20bleacher%20report%20grades In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f9996e0d21d6.pdfIn PDF document text
    • https://site-1216672.mozfiles.com/files/1216672/funejegabepofulututusex.pdfIn PDF document text
    • http://puxeguka.iblogger.org/26618492581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5ff0a5ee3b293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480412/normal_5fdc2c5dd7280.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/gxhbhjV/slither_io_codes_2020_mobile.pdfIn PDF document text
    • https://site-1195597.mozfiles.com/files/1195597/signal_private_messenger_security_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd27a4846be7.pdfIn PDF document text
    • https://site-1176800.mozfiles.com/files/1176800/durexelunoguzenitipezobuw.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/bocigjj/red_blue_gold_balloons.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/5MfGaeu/clash_royale_quest_chest_cycle_updated.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/likadojivivofu/xodalexobuxosizitiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/metro_map_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/pedafipuxakolotixa.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/23943513892.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_off0000eb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB12 5856 bytes
SHA-256: 087fc633f18ddadb0aa4514f66ccb266a5d37e95891571e6d7d7b97d85144150
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10120 bytes
SHA-256: ea28155b4fd23978be46e1907cd7627155e21b600fd977f3749fe3f56a45924a