Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14990944dc8df9f…

MALICIOUS

PDF

48.2 KB Created: 2020-03-17 19:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ce7da6e5ae5d888ec848f5cf8a59f439 SHA-1: 2b80220457403f83f34291741cf5e78a00cce742 SHA-256: b14990944dc8df9f3b58ec160394df50770a6fa81c37b634fc2d6cd6f2e98d75
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, while partially obfuscated, also contains URLs. These links likely serve to direct users to malicious websites or to manipulate search engine rankings. No scripts were extracted from this sample.

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://ndtasanantonio.org/uploads/1/3/0/6/130621162/130621162.html#abecedario+en+ingles+con+imagenes+para+imprimir+letra+por+letra PDF link annotation
    • http://noroydesign.com/uploads/1/3/0/3/130323290/zosavigunexixag_bukusowonixasu_tediwolinuloz_xidatet.pdfIn PDF document text
    • http://cloggingworkshops.info/uploads/1/3/0/3/130323268/5bac5c3817.pdfIn PDF document text
    • http://wifeycosmetics.com/uploads/1/3/0/3/130313415/6041537.pdfIn PDF document text
    • http://premiumheir.net/uploads/1/3/0/8/130814126/wikipo.pdfIn PDF document text
    • http://www.edicionessimiente.com/uploads/1/3/0/6/130639892/9789498.pdfIn PDF document text
    • http://besthawaiilandscaping.com/uploads/1/3/0/7/130774994/47632557db2bb.pdfIn PDF document text
    • http://nfloo.com/uploads/1/3/0/6/130604887/3705407.pdfIn PDF document text
    • http://www.store.generalpencil.com/uploads/1/3/0/5/130546036/tolebimujokazi.pdfIn PDF document text
    • http://bloggersforacause.com/uploads/1/3/0/4/130477039/zesetifafidu.pdfIn PDF document text
    • http://www.oblates-osb.org/uploads/1/3/0/6/130604269/ratafivizod.pdfIn PDF document text
    • http://87solutions.net/uploads/1/3/0/6/130640071/bideseles.pdfIn PDF document text
    • http://samandabeschildcare.com/uploads/1/3/0/6/130621818/fikisafamuvov-kikuwakafev-jaduzebilu.pdfIn PDF document text
    • http://mail.gridleypaige.com/uploads/1/3/0/3/130323908/3285824.pdfIn PDF document text
    • http://www.photoretc.com/uploads/1/3/0/6/130604250/jarovamo.pdfIn PDF document text
    • http://nftebayarea.org/uploads/1/3/0/3/130323181/6532653.pdfIn PDF document text
    • http://katehardingllc.com/uploads/1/3/0/3/130379435/bijipafufofapozawoz.pdfIn PDF document text
    • http://www.bestlittlesouschef.com/uploads/1/3/0/4/130489696/d589794b07bf.pdfIn PDF document text
    • http://mail.fountainheadrandm.com/uploads/1/3/0/4/130490328/26730287054ea.pdfIn PDF document text
    • http://myindependentkids.com/uploads/1/3/0/7/130776702/38664ef2eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 9176 bytes
SHA-256: dd1f65a7509cc5ea6048e3a677119d47241c8a7363a7a55381149ccb7d989698
font_01_sfnt_off00009118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9118 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
font_02_sfnt_off00009a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4C 16340 bytes
SHA-256: 451895f61762ee2c92071758aadde1050fcd1a41f8262062c25ecb60f5c137f5