Malicious PDF — malware analysis report

Static analysis result for SHA-256 2698c86de63e9bcc…

MALICIOUS

PDF

85.1 KB Created: 2021-02-20 16:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a9366e58847f29b80682eeed1576780a SHA-1: 183e4178e010a7ce10b99cbdf8526bdc01963cae SHA-256: 2698c86de63e9bcc2b440c4a661982f85cf38d512fb3cc20ef634beb18274043
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of external links, many of which appear to be part of a link farm designed for SEO manipulation. Crucially, the document employs social engineering tactics, specifically the 'ClickFix' lure, instructing the user to copy and paste commands into the Run dialog or a terminal. This strongly suggests an attempt to trick the user into executing a malicious payload, likely a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://seumenha.ru/wb?keyword=windows%207%20keyboard%20shortcut%20move%20window PDF link annotation
    • https://cdn.sqhk.co/nopavoboriru/eFjgih5/chuchel_2._0._7_apkpure.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/vijuz.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/ab10a64b54d3b.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/jivd6ja/34807346647.pdfIn PDF document text
    • https://masonijajalef.weebly.com/uploads/1/3/4/7/134708569/9440723.pdfIn PDF document text
    • https://fexupewoxi.weebly.com/uploads/1/3/4/6/134619994/895527.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/c9477789f95b.pdfIn PDF document text
    • https://nogorixarolixi.weebly.com/uploads/1/3/0/7/130740589/pitepaba.pdfIn PDF document text
    • http://nibofope.66ghz.com/inspector_alleyn_mysteries_episode_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/zijsijo/tunaxexudorugefe.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/dNhhjcb/table_top_jumps.pdfIn PDF document text
    • http://bepebeku.22web.org/hungry_shark_evolution_hack_apk_2018_android.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/25ade6faf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/desenaz/esc_guidelines_infective_endocarditis_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/what_is_the_punishment_for_prostitution_in_america.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/54286482831.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/17383220567.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/android_10_para_mate_20_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/jaipur_city_palace_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/auto-_tune_8.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_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 5696 bytes
SHA-256: fe25e57b20abbcdda5c7422c75efb7d410bcdca54e31d61fe7836b4d6b0107b2
font_01_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 11900 bytes
SHA-256: 80a8f968fd40d574844cde23e87634417b035d52115169e84a2166e329f071b4

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