Malicious PDF — malware analysis report

Static analysis result for SHA-256 533054dfe03b49ce…

MALICIOUS

PDF

105.2 KB Created: 2021-02-22 22:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 623e83d541392db76df20c7cd67f458e SHA-1: 26d3459a55a467a23760dba5a38d5227187bbe10 SHA-256: 533054dfe03b49ce889c48fbf0f71e10c9f7870d0bfcd63db2fb85772868fb5b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document exhibits characteristics of a social engineering attack, specifically a 'ClickFix' lure, by instructing the user to execute a command. The presence of numerous external links, many pointing to disposable hosting, suggests a link farm designed to distribute malicious content. While no scripts were directly extracted, the PDF's structure and the heuristics indicate it's designed to trick users into downloading and executing further payloads, potentially via embedded JavaScript or by prompting the user to run commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • 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
  • 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://maypoin.ru/strik?utm_term=logitech+wireless+headset+h800+mic+not+working PDF link annotation
    • https://cdn.sqhk.co/kelulegawi/hrtwji9/led_light_ballast_replacement.pdfIn PDF document text
    • https://wisevagidigo.weebly.com/uploads/1/3/0/7/130740356/41ee043c55.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/4428584.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/uPWijjd/lullabies_for_babies_to_sleep_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonelajinu/zjhifBS/when_does_silver_dollar_city_christmas_lights_start.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/ibibKgd/nasefakotumosodetinuwep.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/qicigVp/88730987225.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/ihig5gg/ribuxowukatulap.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/f76df188383a4.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/lRaghd0/dragon_raja_best_class_for_pvp.pdfIn PDF document text
    • https://cdn.sqhk.co/suwixowefa/WxCjfQH/kid_city_gaming_wwe_2k19_tournament.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jc6Zige/boomerang_cast_jojo_siwa.pdfIn PDF document text
    • https://zagarete.weebly.com/uploads/1/3/4/6/134687236/zuxifolawi-gidizakek.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/3fb8ad1b.pdfIn PDF document text
    • https://tatisosef.weebly.com/uploads/1/3/5/3/135333589/gofadewexot_mubav_nepasujikerop_fuzewetabobejuw.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/fab7e879bf03.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/wetowuzuxit/how_long_does_it_take_to_grow_psilocybe_cubensis_mushrooms.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/legubuku.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/base64_encode_php_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/weather_report_new_haven_ct_10_days.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_off00015ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD1 5784 bytes
SHA-256: 500d95d83c2525a34ec85afad504b178b26cdc0df230a3f1ec543b056a018713
font_01_sfnt_off00016e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6E 11832 bytes
SHA-256: 9ca6e7cd142a6a982634e0f0b9becbca12439afbabe2f8533ed0364989c70bef

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