Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4f73d5a8add73f…

MALICIOUS

PDF

68.1 KB Created: 2021-02-27 10:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b4487eb00eaa5739aa6d8e0898f87e34 SHA-1: f106f36e7e94b4def5110ec813ec2b0494291f63 SHA-256: 6b4f73d5a8add73f8439ea26e75af58fde06c977ff045ab2f5c482624feba52b
146 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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=foolproof+module+8+answers PDF link annotation
    • http://bimelar.22web.org/aim_full_form_in_medical.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/8878831.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/xejaxabuwoxuvikiw.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/3080326.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/siwokix-wefuwanijuf-wenoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/ajefNbz/joxon.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/the_devotion_of_suspect_x_reddit.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/fokaxuni.pdfIn PDF document text
    • http://aydym.club/whole_brain_power_bookgism0.pdfIn PDF document text
    • http://itravelgr.com/xososotenelaxiramowk1vh.pdfIn PDF document text
    • http://santecmb-sarl.com/chromatography_analysismqc4v.pdfIn PDF document text
    • http://xelirap.22web.org/offshore_fishing_report_long_island.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/vavapekadoliti/xitukodekuzed.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/9784054978.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/potivarapek.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_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 5428 bytes
SHA-256: 33272714a2b1170c32c1197be2a0a0c63929a9ea4d4d1fa4c9d5039c2e9aad22
font_01_sfnt_off0000df1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1E 10740 bytes
SHA-256: 265ebc6bbdcc5934f76c0b8ebb9906c5374f4146ac15a9fb35b53630a8870f34