Malicious PDF — malware analysis report

Static analysis result for SHA-256 878d43344ed8814c…

MALICIOUS

PDF

48.1 KB Created: 2020-07-08 23:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: c839f7f5a567f6f43e8d549811448758 SHA-1: 5e25e990067bcfddbd30107171a52548631197c7 SHA-256: 878d43344ed8814cdbe34eae4f01e91b8478c9dc7140973562c4dc4ca7446cff
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it's likely a dropper. It contains a large number of embedded links, many pointing to redirectors and a link farm, suggesting an SEO spam or phishing campaign. The document body, though obfuscated, contains a URL that likely leads to a malicious payload or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-9218344-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9218344-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.cc/wb?keyword=arden In PDF document text
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdfIn PDF document text
    • http://files.bjscholarship.org/uploads/1/3/1/8/131871414/todak.pdfIn PDF document text
    • http://files.ccmooresville.com/uploads/1/3/1/3/131381819/tanupip.pdfIn PDF document text
    • http://files.bbawakeblogs.com/uploads/1/3/1/4/131437268/66807.pdfIn PDF document text
    • http://files.merrifieldseminar.com/uploads/1/3/2/7/132710655/7749287.pdfIn PDF document text
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdfIn PDF document text
    • http://files.wordsplusthoughts.com/uploads/1/3/1/1/131164351/liwovemovagonam_xafon_gabenanadigulu_xupakigefasofib.pdfIn PDF document text
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdfIn PDF document text
    • http://files.carriecorebodystudio.com/uploads/1/3/1/4/131437454/2773818.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://womaserimew.files.wordpress.com/2020/06/22080855257.pdfIn PDF document text
    • https://jutalobo.files.wordpress.com/2020/07/14824022355.pdfIn PDF document text
    • https://simipoleguw.files.wordpress.com/2020/07/31785579653.pdfIn PDF document text
    • https://datefakifeba.files.wordpress.com/2020/07/demaxelesaxelepep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000068b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 4800 bytes
SHA-256: 4d787baef20c66d23dc071c793b1e2c6dd2cdefbab55b2be8bf9c6ac0a701c0c
font_01_sfnt_off000078d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 10612 bytes
SHA-256: 2a4ac86d3bda5ef92594ae67dcec1dea36249c4c645da2feb22a36a2923ddf5d
font_02_sfnt_off00009d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5C 16360 bytes
SHA-256: 3b5d6a5e18764a83e000b984417a7ead5370169c5072795cd41614a36f0f0b8c

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