Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1547cbd8faf1a5…

MALICIOUS

PDF

42.3 KB Created: 2020-03-25 10:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 928ae27133f277bb704146a303fb3077 SHA-1: 578c5afe92e1faad84737912762b38e7e578f14e SHA-256: 0a1547cbd8faf1a5e4c9be9d7f243f475c9b97741984dcc545eca006c4b60451
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common technique for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful websites.

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://jennylashwell.com/uploads/1/3/0/7/130739073/130739073.html#types+of+alternative+media
    • http://www.stillwatersweetsbakery.com/uploads/1/3/0/5/130540401/lipuminuxo-doxemuwanexidi-pimumifum.pdf
    • http://hostmaster.asup.it/uploads/1/3/0/6/130604020/pojuzinabudanevilaka.pdf
    • http://maemiclothing.com/uploads/1/3/0/5/130541031/4141039.pdf
    • http://playpokeronlineforrealmoney.com/uploads/1/3/0/3/130323488/9831327.pdf
    • http://lovenetworking.co.uk/uploads/1/3/0/5/130541661/d3ea28db19c41af.pdf
    • http://moodieshop.com/uploads/1/3/0/3/130379332/wesubatituruv.pdf
    • http://quancap.com/uploads/1/3/0/2/130289601/wovut.pdf
    • http://danielshanethomas.com/uploads/1/3/0/6/130639236/sakasojovetozaxoja.pdf
    • http://publicidadzamora.com/uploads/1/3/0/7/130739850/mezapiwun_topatuwagaxaf_linomebebivopuk_zemilerexamexu.pdf
    • http://acadiaextracts.com/uploads/1/3/0/7/130738732/peragoxikaradewat.pdf
    • http://harahardingart.com/uploads/1/3/0/9/130969580/dobozivigoroxudukin.pdf
    • http://gadgetprices.com/uploads/1/3/0/7/130740232/komarubebikujulibizo.pdf
    • http://www.hermajestyenterprises.com/uploads/1/3/0/7/130776786/zaxodokexowub-nosogevimew.pdf
    • http://seed2bowlfarm.com/uploads/1/3/0/7/130775271/vuxifal_tivelamesokel.pdf
    • http://lowermyratestx.com/uploads/1/3/0/2/130287310/eabbb6407f030.pdf
    • http://www.himachalculturalvillage.com/uploads/1/3/0/2/130289478/7232029.pdf
    • http://www.zoongla.com/uploads/1/3/0/8/130814713/beliwisus-judimatofod.pdf
    • http://sundayoboy.com/uploads/1/3/0/4/130435966/923e24.pdf
    • http://drivertraininghq.com/uploads/1/3/0/6/130621342/42917cb067efa.pdf
    • http://www.anncarloenterprisesglobal.com/uploads/1/3/0/7/130739159/1927464.pdf
    • http://www.demariahoeve.com/uploads/1/3/0/5/130590336/3718714.pdf
    • http://049months.com/uploads/1/3/0/7/130775744/6e3b047e74a8da.pdf
    • http://grizzlyrentalsonline.net/uploads/1/3/0/7/130739810/4c96bef52.pdf
    • http://www.eelasor.com/uploads/1/3/0/8/130813835/7f470c4223d.pdf
    • http://amiller.people.ua.edu/uploads/1/3/0/6/130621046/7f1c1e.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_off00007c46.bin
1f50551231968d5ab9fbf5ca72aad29397dd4a8ed6e5f09ce5339298b7ccac50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C46 8132 bytes

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