Malicious PDF — malware analysis report

Static analysis result for SHA-256 735715cf41ae9715…

MALICIOUS

PDF

40.4 KB Created: 2020-03-26 06:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 2eced9b5e500d07cbd87404706373fb4 SHA-1: a81b887cfd976065e5e175b89ef1a10b351c9934 SHA-256: 735715cf41ae9715ad1c49e25d078fc99ed4b8cce8b93a8b41c54bc1077ccbfc
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to various domains, suggesting a link farm or redirection scheme. The 'PDF_SEO_LINK_FARM' heuristic indicates this is likely an attempt to manipulate search engine rankings or distribute malicious content. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence suggest malicious intent, possibly related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://directroofrestoration.com/uploads/1/3/0/2/130289341/130289341.html#1905+edison+cylinder+phonograph PDF link annotation
    • http://326mountainroad.com/uploads/1/3/0/6/130639222/5f16657c4647c.pdfIn PDF document text
    • http://folkswall.com/uploads/1/3/0/6/130620997/nevevutezog.pdfIn PDF document text
    • http://mail.joshuaschubart.com/uploads/1/3/0/7/130776763/7452725844ea8.pdfIn PDF document text
    • http://hopeandhealtherapy.com/uploads/1/3/0/4/130436159/7137113.pdfIn PDF document text
    • http://mandelbrat.com/uploads/1/3/0/6/130621279/2920046.pdfIn PDF document text
    • http://www.snsminersville.com/uploads/1/3/0/8/130874110/dedelujo.pdfIn PDF document text
    • http://radioevasi.com/uploads/1/3/0/2/130287945/94b5bb567.pdfIn PDF document text
    • http://txdetectives.com/uploads/1/3/0/8/130814195/suxopofew.pdfIn PDF document text
    • http://tercollc.com/uploads/1/3/0/5/130550778/78545e.pdfIn PDF document text
    • http://www.shadowcroft.com/uploads/1/3/0/5/130589312/wudoxarebe-pupetulok-busagaterup.pdfIn PDF document text
    • http://iso-insurnace.com/uploads/1/3/0/2/130289651/d984d5e13c3eee.pdfIn PDF document text
    • http://northshorelemonade.com/uploads/1/3/0/6/130621213/suvupakefawusej.pdfIn PDF document text
    • http://thehealthmonster.com/uploads/1/3/0/7/130775760/tixuzujugenepirutes.pdfIn PDF document text
    • http://thetransitioningvet.com/uploads/1/3/0/5/130544703/8a49b410.pdfIn PDF document text
    • http://www.lcdigitalconnect.com/uploads/1/3/0/9/130969507/1949409.pdfIn PDF document text
    • http://mid-atlanticmountainworks.com/uploads/1/3/0/5/130589217/wizixuxomimuxe-bufexojimokifuw-neneduponiw-nikivugig.pdfIn PDF document text
    • http://www.momentsintimepix.com/uploads/1/3/0/9/130969976/soguriju.pdfIn PDF document text
    • http://www.biozantium.eu/uploads/1/3/0/5/130544826/2603376.pdfIn PDF document text
    • http://mcrcontract.com/uploads/1/3/0/9/130969868/tipebu-vapelijuxilol-kulikuputumelu.pdfIn PDF document text
    • http://svet.store/uploads/1/3/0/7/130740196/kikudu-jexupe-kawated-benox.pdfIn PDF document text
    • http://www.pacificperformancecoaching.com/uploads/1/3/0/4/130494743/wujipajezanef_jejediwu_maxolibifowuno.pdfIn PDF document text
    • http://www.chipsyhc.com/uploads/1/3/0/3/130323355/a46dfd6be78.pdfIn PDF document text
    • http://trinityenergycenter.com/uploads/1/3/0/6/130620798/toxiliv-wukobukinoje-diwutuzogeje.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007620.bin
8d17e9394e7f3506fcf190dd237f2792b84be2f6c82cfa909d2254c5d79ddffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 7572 bytes

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