Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e9045a877f85c…

MALICIOUS

PDF

82.4 KB Created: 2021-02-26 20:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fc043bf536ed6657b54b6ff98cae5ac3 SHA-1: 9c36672f887389e1f915aba0953ad1e08b60e1c9 SHA-256: ea0e9045a877f85c3dbafb4c21e8077cae2a9affc35f3fff13485efa28da7804
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or lead users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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) 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://jumiwimov.ru/aws?utm_term=federal+criminal+defense+attorneys+near+me PDF link annotation
    • http://procripton.com/vogubibirobezomebetanamt1dhe.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/icdjfhh/ranking_do_futebol_mundial_de_clubes.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/how_to_write_a_screenplay_for_a_tv_show.pdfIn PDF document text
    • http://gachihyper.xyz/42951668505v8wep.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/luriniwowijarusad.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/katixujusugex.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/japapupafidazetuf.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/how_to_do_six_sigma_certification_in_india.pdfIn PDF document text
    • http://blockingscenery.com/java_collections_time_complexity_cheat_sheetsxn4p.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/DnhcgdC/gallery_wall_black_and_gold_frames.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/pibixezivowofosases.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/7252409.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/jiwotarotavuz/vapapuwekiwawalufazit.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/96037045693.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/andrew_wommack_books.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/data_warehousing_and_data_mining_projects.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_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 5224 bytes
SHA-256: 025342704ef62a86f5d4f80a438a11b4a9f68e2c7018b3905bca9b35b02da294
font_01_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 10444 bytes
SHA-256: 3c3aa2694bbea0ab4a945525116d93eb239f5680792847ff2ca2206fa051bd1e

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