Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e47986f53e9f49…

MALICIOUS

PDF

98.6 KB Created: 2021-04-05 07:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ec476a45cdc564b26a6b9029b0394a2 SHA-1: 56bda5a01130de84f9b398e050c31dac6705fadb SHA-256: d3e47986f53e9f4922e49744f6963f1f7dd8d5a2e2cbbca3df3dd61893f46316
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to distribute malicious content or conduct phishing. The ClamAV detection of 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially harmful, URLs.

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 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://jacksth.ru/strik?utm_term=mansions+of+madness+range+rules PDF link annotation
    • https://cdn.sqhk.co/varugefezum/ehdihaR/monitor_calibration_software.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/28516549151.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/iahbXhg/wukelorukemi.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/UiexAib/does_coffee_increase_resting_heart_rate.pdfIn PDF document text
    • http://hopecommunitynaz.com/xejurivud4buu.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/hjphbha/flight_pilot_simulator_3d_hacked_version_download.pdfIn PDF document text
    • http://flowerport.market/pewikodofugapawufaakucw.pdfIn PDF document text
    • http://livecopyrightverification.com/887500216102u4bi.pdfIn PDF document text
    • http://shoppingyxplus.xyz/80272945161kmmky.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/72886098194d05et.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/calendar_2020_islamic_and_english.pdfIn PDF document text
    • http://i-men.ru/realtek_hd_audio_manager_windows_10_download_filehippo77na8.pdfIn PDF document text
    • http://resimpub.com/gumoxuwikeru3tndz.pdfIn PDF document text
    • http://sokolov.fun/125549322499er2.pdfIn PDF document text
    • http://xovebud.mygamesonline.org/ielts_speaking_topic_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/53vjkkL/cross_wallpaper_black_and_white.pdfIn PDF document text
    • http://7evenrp.ru/44474275187ve49v.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
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_c65cfb836d0c43b0b874176af87dc22a.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_a56241f89f254850b34f97e7d201c753.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_a3ace639b8e54e70a65eaa669f0833a5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FB 5036 bytes
SHA-256: 5e01802ae4ac1136143635e8f16959ae5e65fb454822d3e0b7036fb71604fb55
font_01_sfnt_off000146f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F7 11208 bytes
SHA-256: fa6906a2c62c84951f7c1913e69d552ea297407561e3eb5520114aa626e77ab8
font_02_sfnt_off00016d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D04 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230