Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6c858847cc4387…

MALICIOUS

PDF

45.6 KB Created: 2020-03-09 03:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 83303b12f50566fc3b284239a1622391 SHA-1: 42ae6b7fe23228ceb16a4ac14c758a072aab536e SHA-256: 6e6c858847cc43873e1887c862ceb9ee669d5e88b0d29a18158e1fc292a82548
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious document designed for 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://x0689541xstreamtravel.xsideas.com/uploads/1/3/1/0/131070291/131070291.html#kindle+paperwhite+vs+nook+glowlight+plus+2017
    • http://stylesnsmilessalon.org/uploads/1/3/0/7/130738524/pejaped.pdf
    • http://gleanedharvest.com/uploads/1/3/0/7/130740022/zivafelonafodose.pdf
    • http://artstudiogirl.com/uploads/1/3/0/2/130289651/0074c3616.pdf
    • http://www.shushrestaurant.com/uploads/1/3/0/3/130323210/f0c80530f717082.pdf
    • http://jeffyarger.com/uploads/1/3/0/7/130740330/mobiwejasuzisowop.pdf
    • http://guhjamaicalive.com/uploads/1/3/0/5/130540592/5008313.pdf
    • http://freethought.com/uploads/1/3/0/4/130489144/545308.pdf
    • http://mta-sts.christinaherman.com/uploads/1/3/0/2/130291328/funugilavafenuwin.pdf
    • http://unrealin.com/uploads/1/3/0/7/130775292/7341724.pdf
    • http://velopublicrelations.com/uploads/1/3/0/5/130539179/sunazodezuze_labiru_lejexika.pdf
    • http://raecatherine.com/uploads/1/3/0/5/130590672/wuzobigomipulipafuf.pdf
    • http://balance4yourlife.com/uploads/1/3/0/6/130604757/13294f63.pdf
    • http://noraflum.org/uploads/1/3/0/6/130639655/vezonumabukigi.pdf
    • http://sgtbenton.com/uploads/1/3/0/6/130621024/1499475.pdf
    • http://atlanticseasaltcompany.com/uploads/1/3/0/3/130323599/najujurirofa.pdf
    • http://garethaustin.com/uploads/1/3/0/7/130775087/4e2c95bb3ef02.pdf
    • http://www.comesailingcharterschicago.com/uploads/1/3/0/5/130545493/teleneratidaxum.pdf
    • http://smartschoolskiosk.com/uploads/1/3/0/5/130539309/81645cca29abbfa.pdf
    • http://minniecandiepies.com/uploads/1/3/0/6/130605278/2858263.pdf
    • http://serenityonesanctuary.com/uploads/1/3/0/5/130546880/lazedef.pdf
    • http://aimeezeller.com/uploads/1/3/0/3/130313356/6943371.pdf
    • http://keshashouseoftranquility.com/uploads/1/3/0/8/130814009/feedd5fa384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eaa.bin
64c54a1e8e86ab5b9777dc71fcb04ccd8acb0c3f211b98e0bf4e23b7fe76bf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 8428 bytes
font_01_sfnt_off00009efb.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFB 2616 bytes

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