Malicious PDF — malware analysis report

Static analysis result for SHA-256 594fde40b50a3273…

MALICIOUS

PDF

84.0 KB Created: 2021-03-22 22:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d9441e3428ad33b5d6f3612500f12434 SHA-1: 2df4c755dbf371964bb4a2daae927fb9edba1988 SHA-256: 594fde40b50a327366c303574106bf572f148ee59cc9a5f2da75805f78f90392
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to unknown domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://sollabs.xyz/falodaguxodnjap.pdf In PDF document text
    • http://pe50off.info/morijalunizixewegazur4snf.pdfIn PDF document text
    • http://jujavekerubeko.scienceontheweb.net/2136784088.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/40646274260.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/go_math_grade_5_book_online.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/soil_mechanics_bm_das.pdfIn PDF document text
    • http://paktum.pro/where_is_the_reset_button_on_my_whirlpool_hot_water_heatertzons.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/jijbJhj/reripemejokuf.pdfIn PDF document text
    • https://cdn.sqhk.co/viposaxa/hfOvPie/vujogeduxojujetokaxubowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://feedproxy.google.com/~r/Infin/~3/gHjFPNPvf4I/infin?utm_term=axonal+polyneuropathy+pdfPDF link annotation
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_65c9587771d14b4c9d4f1b2e3ea3d7d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuponefi/bss_segment_full_form_in_c.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_9e8a870883de49299cb8277dfad209f2.pdf?index=trueIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_69393089fc2e420da0db45b827dc1ed1.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_79d39320b82749b0b300df22c21822cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/dplyr_cheat_sheet_r.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_a27490ea3ff54b82ab4eeb55d490ccf7.pdf?index=trueIn PDF document text
    • https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_79020d76f4324838b46c8ef495876d36.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_97b4a77d20d046b09f3e3fda385fd737.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_38f3036544dc447bbb51d8a8180a5ac6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/netbeans_tutorial_2020.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 4944 bytes
SHA-256: e673b74e4bb07a791100abc46ababcf707ee3f67ccc2b98781c225585cc373c3
font_01_sfnt_off00010e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E99 11296 bytes
SHA-256: 07d37cbc914665f880791a778b552549a524d8dbf918b9087f440e24cf5acccd
font_02_sfnt_off000134e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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