Malicious PDF — malware analysis report

Static analysis result for SHA-256 959593868709c16d…

MALICIOUS

PDF

50.0 KB Created: 2020-04-02 08:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 59574722bcd06a931becd1d668c4c6d0 SHA-1: e0d8fb139cb044250332f2ca0649bb7c6320274d SHA-256: 959593868709c16d1b3c9bab3617a947041b05a7651991270f6c168fe8f4434e
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains references to some of these URLs. No scripts were extracted from this sample. The primary attack pattern appears to be directing users to a multitude of external 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://raytastics-light.com/uploads/1/3/0/2/130288552/130288552.html#limits+involving+inverse+trigonometric+functions PDF link annotation
    • http://fishbowllabs.com/uploads/1/3/0/6/130620222/sodivujanirefav-guganoj-buzebu-barosudupe.pdfIn PDF document text
    • http://islandstyledelivery.com/uploads/1/3/0/2/130270748/viminafamulapi.pdfIn PDF document text
    • http://hochatown.org/uploads/1/3/0/5/130543276/4071694.pdfIn PDF document text
    • http://chocny.com/uploads/1/3/0/7/130738890/a4ae31.pdfIn PDF document text
    • http://iuber.ca/uploads/1/3/0/7/130739315/nopujobojujisag.pdfIn PDF document text
    • http://aworldinneed.org/uploads/1/3/0/5/130550873/bagasejuwuxag.pdfIn PDF document text
    • http://hippiegypsylife.com/uploads/1/3/0/9/130969835/kivepivux-tugofewinolato-dujinesote-wavegaku.pdfIn PDF document text
    • http://odesignit.com/uploads/1/3/1/1/131164266/loxapusi-sojulipem.pdfIn PDF document text
    • http://boneyardmusicpublications.com/uploads/1/3/0/6/130621918/91d225e115d8d.pdfIn PDF document text
    • http://visionsportsphotography.net/uploads/1/3/0/5/130541346/pekodesur.pdfIn PDF document text
    • http://rememberproperty.com/uploads/1/3/0/2/130271001/tisabarawe-kopunevujiluvi-lurufomod-wafojovugepezi.pdfIn PDF document text
    • http://webmail.dance4joy.info/uploads/1/3/1/4/131452745/6424062.pdfIn PDF document text
    • http://purchasesupport.us/uploads/1/3/0/7/130738603/674840.pdfIn PDF document text
    • http://neparemovals.com/uploads/1/3/0/8/130814597/209382.pdfIn PDF document text
    • http://ellemboutique.net/uploads/1/3/0/6/130639884/lutatebivozelif.pdfIn PDF document text
    • http://swansonfitness.net/uploads/1/3/0/6/130640021/db58c6576ef9.pdfIn PDF document text
    • http://naturalfitnessvt.com/uploads/1/3/0/3/130313746/fezufafun.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BE 8572 bytes
SHA-256: 027ed514145ba6276142d22b0952bf6610c3d46825069adccb984a984b138a4d
font_01_sfnt_off000099b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B1 2852 bytes
SHA-256: db056d6b75001de5db1a3468c5d064d74740f4b0d9fc0843f21179ce511eb003
font_02_sfnt_off0000a3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D7 16204 bytes
SHA-256: eef5421b7a88df54701d46e1720ddf78bcce8135432c13043835010f12c9bb92

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