Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e418e83babc1d1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-16 02:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8bcd83c8877611508c9b1e74f1120e94 SHA-1: 2198441f2b5cd4868136c129b9e004cc7b460a70 SHA-256: a0e418e83babc1d1fc64312bd560a211df6eb69ed163e69a135935222f667331
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://druttle.ru/wix?keyword=the+pervert%2527s+guide+to+cinema+streaming+sub+ita PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455195/normal_6004dc522f738.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/15322894812.pdfIn PDF document text
    • https://roxoxadedetep.weebly.com/uploads/1/3/4/5/134520556/4263294.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/3cb83ed5bdb9083.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/bazelawatevujul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426954/normal_5fffe79d8c6bd.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/60006582380.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/pawovetosusap.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/82611401477.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/what_does_cronbach_alpha_mean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df724b9c-5c5d-4e69-ad9b-99af53197c17/74168610070.pdfIn PDF document text
    • http://ritudepasanobok.rf.gd/uab_campus_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c7301-c6c1-4d7e-988d-09b1779a6c43/how_to_control_the_water_pollution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220d9baf-bdd6-4368-be22-f0f3872a5827/schumacher_battery_maintainer_sem-1562a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1943b3c4-b4dc-45f4-b2cb-7a8cd73052ff/fomifulom.pdfIn PDF document text
    • http://lararuzimefusi.rf.gd/94550550458.pdfIn PDF document text
    • http://sulupajus.rf.gd/jafuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25429bcf-e806-4524-8dd6-e2875c5b0d72/h-joshua-h61-uatx_sata_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1436ddc5-857b-41a0-84fa-5dd053d18a87/omoton_ultra-slim_bluetooth_keyboard_for_galaxy_tab_s5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/803f96e2-fe83-4765-93f4-cf356cd8f722/real_estate_broker_near_me.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_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 5640 bytes
SHA-256: ec9cf88ab3948cf1205ac470e93ad8e630da76299a0ed0bb1ad52541b458b4d8
font_01_sfnt_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 12284 bytes
SHA-256: 068b91f96d25325112dfb8aacb755bbbe7b2f1e206e830a769b667c6dd5db008