Malicious PDF — malware analysis report

Static analysis result for SHA-256 9454db3e08c4eb72…

MALICIOUS

PDF

109.3 KB Created: 2020-06-19 17:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 931d58b4fccbee618589964019e89df4 SHA-1: cb34a6d7a4683a6881707bea94dd512c2cc9036f SHA-256: 9454db3e08c4eb72cf2268f80408139e2114ca5d198c6ee1f671ddb5102ddb9f
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body mentions 'Clarion cz309e user manual' but this appears to be a lure to disguise the malicious nature of the links. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kamaraworldwide.com/uploads/1/3/1/4/131437283/131437283.html#clarion+cz309e+user+manual PDF link annotation
    • http://katalystvirtual.com/uploads/1/3/0/6/130621148/f528f4588239a.pdfIn PDF document text
    • http://mta-sts.lanuovasfera.it/uploads/1/3/0/6/130604285/a0deaa93e4b0ba.pdfIn PDF document text
    • http://calvarychurchloveland.org/uploads/1/3/0/5/130541817/levuw.pdfIn PDF document text
    • http://carsonart.net/uploads/1/3/0/6/130639099/numeju_zepijob_sizomep.pdfIn PDF document text
    • http://hostmaster.connectaccounting.co.uk/uploads/1/3/1/4/131437725/2179613.pdfIn PDF document text
    • http://mx.bloodrock100.com/uploads/1/3/1/4/131454482/jojiwizikebegitex.pdfIn PDF document text
    • http://ahcup.org/uploads/1/3/0/2/130270793/rigabejaf-tuvezu-rexenopidu-voboxo.pdfIn PDF document text
    • http://autumneyre.com/uploads/1/3/1/3/131398187/b2805e3a79.pdfIn PDF document text
    • http://pride370.com/uploads/1/3/0/5/130550772/lamisasuni_zinizudujuxirez_gezuvad_vunopurenamar.pdfIn PDF document text
    • http://cpanel.cabincreekfarmstudio.com/uploads/1/3/1/0/131070566/gadorusupomob_vebate_janejati.pdfIn PDF document text
    • http://socalcenterforantiaging.net/uploads/1/3/0/6/130639465/1fa3aa72b3c164.pdfIn PDF document text
    • http://webdisk.saroyadance.com/uploads/1/3/0/7/130776861/be1bc77ca3b5e7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 5284 bytes
SHA-256: ca0cc437bd345812c492a17abed25e3a2955705516d13a11bd61b7ef4c882a17
font_01_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 21020 bytes
SHA-256: 07165e478bdc76860b28283b5aebbd414fbd688cc486d3e5d8d85666e733213a
font_02_sfnt_off00014248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14248 5320 bytes
SHA-256: 73f5d58b5792d6e2675760a3cbd21a2ea10140b29c8c0d9027bee3959cb5a941
font_03_sfnt_off000155ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155AD 17604 bytes
SHA-256: e891494fb43b3a2c064e68e469c3a716c1c109defe8943065addee4fcfae97a7
font_04_sfnt_off00018be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BE7 10976 bytes
SHA-256: 073e1029157e8eb63a7e000e1bfb1222c8cebb952c03ac1f8295afb8918d52d2

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