Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1b0e66bb09edf8…

MALICIOUS

PDF

50.3 KB Created: 2020-04-02 10:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2542a36493a2499ba766917702862c15 SHA-1: 1b698ba019eed965b1f8271049e1ae1729dcd47d SHA-256: ed1b0e66bb09edf8e78c297cc788509ca7c676089d2829e02a14fab4a7286238
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Essentials of human resource management ppt' and references the wkhtmltopdf tool, suggesting a lure to download or view content. The primary attack pattern involves directing users to a vast network of linked PDF files hosted across various domains, which could be used for SEO spam or to distribute further malicious content.

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://jessicalgervaisbooks.com/uploads/1/3/1/4/131454352/131454352.html#essentials+of+human+resource+management+ppt
    • http://varsityvisits.com/uploads/1/3/0/5/130543133/tuxewowu.pdf
    • http://radnursesguide.com/uploads/1/3/0/6/130621730/kugujogozegag-rabeni-rilokeduset.pdf
    • http://bohojane.com/uploads/1/3/0/5/130551534/4de1a4f95422.pdf
    • http://jljohnsonproperties.com/uploads/1/3/1/4/131437350/da4ce5.pdf
    • http://crownrealestateholdingsllc.com/uploads/1/3/0/5/130540559/molewobafejo.pdf
    • http://richardstark.studio/uploads/1/3/1/3/131384374/zezipoworuf-jifolotogu-besewa.pdf
    • http://truesinhomecreations.com/uploads/1/3/1/4/131454696/mifobokibevi-wuvewozowebusox-totemofivigunin-wanuso.pdf
    • http://dogtownrva.com/uploads/1/3/0/7/130738740/3400640.pdf
    • http://itstartswithone.com/uploads/1/3/0/5/130551630/davozosule.pdf
    • http://mail.charlestonstemfest.org/uploads/1/3/0/2/130271061/fotiririlewonefof.pdf
    • http://drycleanthroughthemail.com/uploads/1/3/0/2/130270993/popimojadujexo-zadaxafuk-liwop.pdf
    • http://stntradingenterprise.com/uploads/1/3/0/7/130776411/d6a3549fe0d20.pdf
    • http://mobiledesigntechnology.com/uploads/1/3/0/7/130775336/pezenojenetedi-puxumi.pdf
    • http://maureencreations.net/uploads/1/3/0/8/130814397/xozokerumopof.pdf
    • http://pyarabeauty.com/uploads/1/3/0/6/130621102/2ca3681f.pdf
    • http://nsbbeachproperties.com/uploads/1/3/0/2/130291561/6181580.pdf
    • http://michelleplozza.com/uploads/1/3/0/5/130539092/niwedomulesuzejeriz.pdf
    • http://sarniantiling.com/uploads/1/3/0/9/130969185/dusakavul-wisabadatimubi-fujipuli-kapemasidixuse.pdf
    • http://casablanca-mansion.com/uploads/1/3/0/5/130588710/0822d65853e0.pdf
    • http://creationsbyintention.com/uploads/1/3/0/5/130590550/vonolakobuwe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b1d.bin
422d93662ccf8536ce83add6be7146cdf080f56a3ccf37a171eae14cdaef8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1D 8392 bytes