Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75ed82485f9a3c3…

MALICIOUS

PDF

71.4 KB Created: 2020-04-03 04:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 8ac6774b54479f9b233ad97fd6d63546 SHA-1: bdeef8f98332cee4d7e2b037616dcdf55f30e58c SHA-256: b75ed82485f9a3c3e463f4b791ae57db08bd0a291e81e8e21df988b049447b76
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm for SEO manipulation or malware distribution. One of the extracted URLs, 'http://theelfbox.com/uploads/1/3/1/1/131164043/131164043.html#yi+4k+action+and+sports+camera+manual', is presented as a manual for a popular camera, likely a lure to entice users to click. 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://theelfbox.com/uploads/1/3/1/1/131164043/131164043.html#yi+4k+action+and+sports+camera+manual PDF link annotation
    • http://jttechsolutions.net/uploads/1/3/0/2/130271087/d4b850707754.pdfIn PDF document text
    • http://epicautoleasing.com/uploads/1/3/0/4/130488288/9083749.pdfIn PDF document text
    • http://mardigrasnorth.com/uploads/1/3/0/6/130640088/1ddc77663c7d82.pdfIn PDF document text
    • http://dynstynetwork.org/uploads/1/3/0/4/130489123/garirojisu_vupixamudufa.pdfIn PDF document text
    • http://enads.org/uploads/1/3/1/0/131070518/2753801.pdfIn PDF document text
    • http://ornamentology.com/uploads/1/3/0/6/130604273/8ebdb38.pdfIn PDF document text
    • http://smbrandmgt.com/uploads/1/3/0/9/130969019/8793961.pdfIn PDF document text
    • http://anchorsaweighbodywaxing.com/uploads/1/3/0/5/130588810/eb7d1e59b6.pdfIn PDF document text
    • http://djgarbin.com/uploads/1/3/1/3/131379904/3190951.pdfIn PDF document text
    • http://lacapdevelopments.com/uploads/1/3/0/6/130621815/16da4f90.pdfIn PDF document text
    • http://usmbcm.com/uploads/1/3/0/7/130739129/9253904.pdfIn PDF document text
    • http://hamiltonsystemsintegration.com/uploads/1/3/0/7/130775958/16e952417.pdfIn PDF document text
    • http://dasignsuorce.com/uploads/1/3/0/5/130547450/jipedekoxodug.pdfIn PDF document text
    • http://withlovencare247.com/uploads/1/3/0/5/130590420/8409329.pdfIn PDF document text
    • http://stephen-laurence.com/uploads/1/3/1/1/131163828/nulukupaxodekuga.pdfIn PDF document text
    • http://healingbypegarner.com/uploads/1/3/0/6/130620198/9811769.pdfIn PDF document text
    • http://recoveryspecialistsamsterdam.com/uploads/1/3/0/6/130620525/jozir.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
🗂 Part of campaign: hamiltonsystemsintegration.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3F 9416 bytes
SHA-256: d51627afd50632ac805ae36954dc9f97d91123a6753d12f058920a5769fce950
font_01_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
font_02_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63