Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2503a0f026a013…

MALICIOUS

PDF

41.1 KB Created: 2020-03-29 06:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 76d368be7831013ae1fa7c1397771772 SHA-1: 369914056d4cee2aa900bc84001bc9fd8b65be36 SHA-256: 5d2503a0f026a013141f601f8091c111c04006e66033f1fa4c7138d87cc0c686
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a large number of external links, many pointing to other PDF files. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary purpose appears to be directing users to a network of potentially malicious or SEO-abused PDF documents hosted across various domains.

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://advance-it.net/uploads/1/3/0/7/130776889/130776889.html#valles+tecnicas+cualitativas+de+investigacion+social+resumen
    • http://landesgartenschau-badiburg.de/uploads/1/3/0/5/130588956/fiwedefabazafa.pdf
    • http://yokel411.com/uploads/1/3/0/6/130604401/7923a74daed.pdf
    • http://www.raidindeejai.org/uploads/1/3/0/6/130604550/fc97059f894595a.pdf
    • http://mcheyward.com/uploads/1/3/0/5/130540182/6205840.pdf
    • http://www.wops-shop.us/uploads/1/3/0/6/130605492/kurosaxe.pdf
    • http://rochestersportsfan.com/uploads/1/3/0/4/130477613/4297678.pdf
    • http://devonprivatechef.com/uploads/1/3/0/6/130621130/59d21245b09.pdf
    • http://dominiquejoy.com/uploads/1/3/0/9/130969462/kerinowidu.pdf
    • http://vistanciamomsclub.com/uploads/1/3/0/6/130639273/65136967cb620.pdf
    • http://charlottehighersoriginalart.com/uploads/1/3/0/7/130775921/4311782.pdf
    • http://www.yolostonehemp.com/uploads/1/3/0/3/130323889/9902435.pdf
    • http://bdcglobalpng.com/uploads/1/3/0/5/130543305/sukatexef.pdf
    • http://doctormelona.com/uploads/1/3/0/7/130738764/xamumenew.pdf
    • http://skylighthk.com/uploads/1/3/0/6/130639933/fabodex.pdf
    • http://jaccuzzoforsheriff.com/uploads/1/3/0/3/130313305/rexekexilomesev.pdf
    • http://asiainnogrp.com/uploads/1/3/0/6/130621279/717a6e.pdf
    • http://hinojusu.net/uploads/1/3/0/6/130604434/ramamubudexo.pdf
    • http://www.gracefulaccents.com/uploads/1/3/0/7/130776754/2224034.pdf
    • http://helpingthevets.org/uploads/1/3/0/8/130814669/2c457ac67c9.pdf
    • http://allurebundlesandmore.com/uploads/1/3/0/6/130604369/xizanawasibopa_zotil_sogisu_depofu.pdf
    • http://bmcl.us/uploads/1/3/0/6/130621447/3850794.pdf
    • http://janfitzhugh.com/uploads/1/3/0/7/130740133/5435d26314f1df5.pdf
    • http://kinderchat123.org/uploads/1/3/0/6/130604102/6548888.pdf
    • http://patchezplus.com/uploads/1/3/0/5/130540172/002d007d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ba.bin
822ed7c8c352d7a618687b9b59325aea968fa252dae5b2680304f87877fefd9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 8296 bytes

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