Malicious PDF — malware analysis report

Static analysis result for SHA-256 1998fb7d25a29807…

MALICIOUS

PDF

63.8 KB Created: 2020-03-24 13:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c05a4ca88b8f96500a0079c5280f7641 SHA-1: 6a42976d7e6ae664f1822148cb45959acb12a6bd SHA-256: 1998fb7d25a298071e0c860d9e3188736c603cdbe4410c3bcaf4440ad7d4b09e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, indicating a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to various domains, suggesting an attempt to redirect users to potentially harmful content or phishing sites.

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://kelbels.org/uploads/1/3/0/7/130740572/130740572.html#mr+heater+big+maxx+80000+btu+installation
    • http://periscopedigital.com.au/uploads/1/3/0/2/130292007/5071492.pdf
    • http://www.longtranfilm.com/uploads/1/3/0/7/130739786/5824708.pdf
    • http://dcss.sytechsolutions.com/uploads/1/3/0/2/130270913/zemupiwuja.pdf
    • http://kisp.ru/uploads/1/3/0/6/130605094/mibuburibuxatap.pdf
    • http://thewesgroupllc.com/uploads/1/3/0/3/130379254/nopoxoxefe.pdf
    • http://edenwoodranchandpreserve.com/uploads/1/3/0/5/130543006/gaxewimuduw_zubomok.pdf
    • http://babygirlsbakery.com/uploads/1/3/0/5/130539105/xelapisekatugive.pdf
    • http://ppisydney.com.au/uploads/1/3/0/4/130489070/8250029.pdf
    • http://www.orca-edu-international.com/uploads/1/3/0/7/130739119/wirixuxejujusiga.pdf
    • http://avispire.co.uk/uploads/1/3/0/4/130490193/pelixatur-pibav-womiragaxadewop.pdf
    • http://www.craftquizes.com/uploads/1/3/0/5/130588998/gawikimazuxijir.pdf
    • http://adultvideoreleases.com/uploads/1/3/0/2/130289775/fuvej_jonapoda_vavutaz_bukatovavu.pdf
    • http://jacintaprice.com/uploads/1/3/0/5/130589246/fonexipakumuvabani.pdf
    • http://turkishbusiness.net/uploads/1/3/0/5/130588605/41aece244.pdf
    • http://autodiscover.johnvoso.com/uploads/1/3/0/2/130287424/vazagotepur_zilozulur_vovojaju_nivukudud.pdf
    • http://efinicaragua.org/uploads/1/3/0/5/130543536/jewul.pdf
    • http://bethwayseer.com/uploads/1/3/0/6/130639329/lurisomajurabir-kitefukufetelet-rukix.pdf
    • http://clubheros.org/uploads/1/3/0/6/130604550/4408673.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a58b.bin
7e3c81dfeade759d95161ccab897685210e7a08473cd27bc2cd9a5f90751649f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58B 9216 bytes
font_01_sfnt_off0000c8a7.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A7 2616 bytes
font_02_sfnt_off0000d1d7.bin
49cec60e4d621eb3739a6bfbe419d495dd28b3d92d3ca82e6e4e25b91d0fa0f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D7 1868 bytes
font_03_sfnt_off0000daaa.bin
0f23141ba94d37b49c53016ac63a9b008a6ac8e4c4656a8d80e6725f77750189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAA 16140 bytes

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