Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5589fb79b61ba86…

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 01:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 008c48d98abe32f9e90520d7fff84579 SHA-1: f130a0beb6502b6b53b60353f6e35fc2cd217d86 SHA-256: e5589fb79b61ba869ff5e1f70c12feb3443d74fb6b4c0e332f7ad070e3417d8b
166 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains multiple links to external websites, including one identified as a link farm on disposable hosting, and another with an algorithmically generated URL. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and a date, suggesting it might be a generated document used as a lure. The presence of embedded URLs and the heuristic firings strongly suggest an attempt to redirect the user to malicious content, likely for downloading further malware.

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://baarspo.ru/wb?keyword=victoria%20secret%20models%20from%20the%2090s PDF link annotation
    • http://kameregeperiwaz.22web.org/gakivebulopuraz.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/jby6981/1686646657.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/ie0gey7/exploration_place_wichita_ks_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/Sheibey/amc_orange_30_anaheim.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ehc4Jij/zusapebudiwuxat.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/jjXjalm/wazarunelunutowovos.pdfIn PDF document text
    • http://creampiepow.club/comptine_dun_autre_t_laprs_midi_free_downloadpuzzr.pdfIn PDF document text
    • http://genoray.pro/xiraxovonukatewixisedidefdrdnm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483591/normal_5ffe45b749651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fe03ad5ea258.pdfIn PDF document text
    • http://heliusdesign.ru/50080309004k6i9t.pdfIn PDF document text
    • http://sungo1.space/fishman_loudbox_mini_bluetooth_not_working7jw3l.pdfIn PDF document text
    • http://sofejisogon.22web.org/45963137155.pdfIn PDF document text
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/vabasevugora.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/takebemanijewok/android_10_release_date_for_samsung_j6.pdfIn PDF document text
    • http://wekidezeze.epizy.com/creative_writing_senior_high_school.pdfIn PDF document text
    • http://vujoponax.epizy.com/vulefol.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/56148078937.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 5524 bytes
SHA-256: bcde9a11ca13ab334418f9392d7c503fa6ffe186823732fafc19cf78ab0731ed
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 11504 bytes
SHA-256: d488e33697bf279938d80de49eeba0bae8ebb75682eb00ba24ea2d3955dd4edf

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