Malicious PDF — malware analysis report

Static analysis result for SHA-256 614f3e40a106ca95…

MALICIOUS

PDF

67.2 KB Created: 2021-02-13 19:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c22a5dd469455348f2df2d3a2ba2d434 SHA-1: 4662784ee9445b6c572f76e227770639efc2a6f0 SHA-256: 614f3e40a106ca9552b59fa090a5cf761b4b78a0a8da1dbee2bcb1806fabe52c
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector and a link farm. The document contains numerous embedded URLs pointing to various domains, including known malicious redirectors and disposable hosting. The primary function appears to be directing users to potentially harmful external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=hp+2311x+manual In PDF document text
    • http://inmyshtangen.xyz/wimekusejivuwumadhcg6i.pdfIn PDF document text
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/2104706.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/guvot-robegafojili-sefugi-zatunudideme.pdfIn PDF document text
    • http://saudiautoinsurance.com/zufexefofixebenikudapadzlvc8.pdfIn PDF document text
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/ropejadafawogepe.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/50b6a643d.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/tupuwuforisukuwu.pdfIn PDF document text
    • http://xikimifo.66ghz.com/saposuzigunik.pdfIn PDF document text
    • https://dusukipujadun.weebly.com/uploads/1/3/1/4/131437174/1f942daef.pdfIn PDF document text
    • http://pavogireb.22web.org/rental_agreement_format_in_english_tamil_nadu.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/wefinaxetujape-zerunokit-watata.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/1180357.pdfIn PDF document text
    • http://arm-watch1.club/imperial_march_alto_saxd5s8o.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/feborobegibew/conjunctions_worksheets_for_grade_7_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/gulofaro.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/torojuji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC052 3184 bytes
SHA-256: 1fed468fcebe2001473c3dfd7ab383d9082e1082c0794ae45ff017eeff00fe5c
font_01_sfnt_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 5068 bytes
SHA-256: 4a526c812dd3129700a363ccaa1efd3f11b0876a0acd142632f0dffa7def729b
font_02_sfnt_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 10460 bytes
SHA-256: f24936d2edb2a361d278ce0d37ae96a1e9a85fcacf1373f4512b38c54557399f

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