Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48729547037bc50…

MALICIOUS

PDF

88.0 KB Created: 2021-02-26 06:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 986bb60c5fedd8cdd8e16781f4b039b9 SHA-1: 6998090c728aba40eb84a3a4741aad97bbb067f5 SHA-256: f48729547037bc5089a16f0eca5dbdcd13bb12da71ddc4ea92f108d9ac213772
134 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting multiple PDF documents hosted on disposable domains, with one URL specifically mentioning 'fujitsu fi 6130 driver windows 8 64 bit' as a lure. This suggests a phishing or malware distribution scheme, likely using the driver download as a pretext to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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 https://jottigo.ru/strik?utm_term=fujitsu+fi+6130+driver+windows+8+64+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401559/normal_600c595de7d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/hkeic19/king_kong_kicker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_601de80f35220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_6032279de7105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff28a4f979f2.pdfIn PDF document text
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/2918007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fce9ddcce5b0.pdfIn PDF document text
    • http://muzotom.22web.org/private_practice_cast_season_4_episode_5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogutofiwib.rf.gd/poberufukuliwoj.pdfIn PDF document text
    • http://bewebumaxof.epizy.com/minions_wallpaper_4k_for_android.pdfIn PDF document text
    • http://nawexox.epizy.com/38397295159.pdfIn PDF document text
    • http://roxeruteruda.epizy.com/cities_skylines_traffic_president_guide.pdfIn PDF document text
    • http://fegarezitima.rf.gd/tosizekuvugem.pdfIn PDF document text
    • http://madulok.epizy.com/how_to_develop_data_science_skills.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000126a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126A2 25600 bytes
SHA-256: 291245d51b418fdcf031af126b0219923cd2415020be4ee5e401d6bf61cef48c
font_00_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 5776 bytes
SHA-256: 5a4fb79bc6e55d973cd8ed8a6540d137160c2124ddb1a59f16cc2f5cbb381b6e
font_01_sfnt_off00010313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10313 10296 bytes
SHA-256: 4c059b00ae83bb4da142bffa4edf573f8e0d78a4fe45bc1b527789095b8f60a1

Open this report in the interactive analyzer, or submit your own file for analysis.