Malicious PDF — malware analysis report

Static analysis result for SHA-256 24850bae569b2a5f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 02:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bd04bb0ca43e86a4221ad2e58255e5f6 SHA-1: dcba561744ae248a3e078351aaefb6c6849cc0a2 SHA-256: 24850bae569b2a5f7ab395c8bb7a816c861f9fca9ba058bc448388891ae36806
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/123?utm_term=makita+ls1013+dust+bag PDF link annotation
    • https://dakawomafi.weebly.com/uploads/1/3/5/9/135959339/33241ebb5.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/9303723264.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/tenigesakakililifez.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/hjasgih/prank_call_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/0ijbPRN/voicemeeter_potato_setup.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/93853045965.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/GMDgcjj/santorini_greece_weather_in_november.pdfIn PDF document text
    • http://terugate.mypressonline.com/lafadasofufeluvisij.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/wordpress_redirect_to_login_page_after_login.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/poulan_pro_blower_fuel_line_size.pdfIn PDF document text
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/tagomunubozur.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/99390327943.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/gj96xhV/winter_bird_houses_cross_stitch_pattern.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/17879629557.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/how_fast_to_run_5k_in_20_minutes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB59 5464 bytes
SHA-256: 8dea3de91da3257c84610470e8161d78e21fdc87494e4a69cbe7efbb505fc28a
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 16204 bytes
SHA-256: 7a31296c24cd93c19603e09b4b6daba7b82ec573e7e4254b005e080b8d146983

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