Malicious PDF — malware analysis report

Static analysis result for SHA-256 9104b31f84793a58…

MALICIOUS

PDF

75.7 KB Created: 2021-04-29 14:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f27be865521f023974c4a645db5a1214 SHA-1: de44558ffe74ae1e5aa2a0f2fb4e8a7befa3b882 SHA-256: 9104b31f84793a58dcff1b64727d63bd9ad9abd45136ac04cac533ce193848b5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, and contains a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, appears to be related to search terms for 'Lg washing machine manual top loader', suggesting a link farm or SEO spam tactic. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=lg+washing+machine+manual+top+loader PDF link annotation
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/kurine-vowul-rogajuxepire.pdfIn PDF document text
    • https://tiguziriwisil.weebly.com/uploads/1/3/1/0/131071210/pasexavulak-rapab-mitezamalex-fubimif.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/geheigJ/falukiragituf.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/qrjhjcK/41222420560.pdfIn PDF document text
    • https://dovapudatanul.weebly.com/uploads/1/3/5/9/135985540/1159905.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/zusasixijetu.pdfIn PDF document text
    • https://xerupirep.weebly.com/uploads/1/3/1/4/131408033/112574.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/uic7haI/foboforixiwax.pdfIn PDF document text
    • https://jetujonupukoj.weebly.com/uploads/1/3/1/1/131163664/gulubenejetuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ihgjc4Y/bellator_mma_onslaught_xbox_360.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/90542cfd444.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/gjcsohc/isaiah_berlin_two_concepts_of_liberty.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/xesujegejodosepaped.pdfIn PDF document text
    • https://dizoxagesok.weebly.com/uploads/1/3/4/3/134363212/terasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_950be82d4cad4961bbe88240b3984f95.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_c780a5fd3b634aedba4d4e57874505d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/informational_reports_require.pdfIn PDF document text
    • http://dejogamolefip.rf.gd/bbc_news_android_app_apk.pdfIn PDF document text
    • http://xufeguwopox.rf.gd/jisamaxedudebagokanajo.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_4756c66a4e1a40daa870758b0620372a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/jbl_sb400_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/28819029384.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_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 5520 bytes
SHA-256: cbe441f17f9b02547f41395b756b2c2deb5baf1a67101b43b1b45eef5981657e
font_01_sfnt_off0000fb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB69 10656 bytes
SHA-256: 6b400eb9a7cf8883d37c7ef34b8e03e46beb3a1e9b449d295b3d4a0ead7b5438