Malicious PDF — malware analysis report

Static analysis result for SHA-256 12088267677350f7…

MALICIOUS

PDF

48.7 KB Created: 2020-03-22 08:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02d3e2e2124631ff18c33f71acd7ae81 SHA-1: ed353b724d928930dddeba3aa1fd3aaab3e1ef88 SHA-256: 12088267677350f7657a07f904da4afd5a2719e034e286b63dd62a03f7e95536
136 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 'PDF SEO Link Farm' heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. The embedded content, while heavily obfuscated, appears to contain URLs that are part of this link farm, suggesting the document's primary purpose is to redirect users to a network of malicious or spam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://t2glifestyle.com/uploads/1/3/0/3/130313224/130313224.html#god+of+war+region+konunsgard+ravens
    • http://mail.graceclt.com/uploads/1/3/0/4/130489082/xefujudor_bopevevituseka_zifiwu.pdf
    • http://truvisioncolombia.com/uploads/1/3/0/7/130740597/pimoparorusep.pdf
    • http://prettypoliticalcp.com/uploads/1/3/0/6/130621003/povoluf-zozojusuvuk-jujiwadujogabon-xulovizilikeze.pdf
    • http://all-enproducts.com/uploads/1/3/0/7/130776056/zotap.pdf
    • http://outsiderworkout.com/uploads/1/3/0/2/130272636/poburunigo-toxivuror-zixibeza.pdf
    • http://wijdstraat.nl/uploads/1/3/0/7/130775797/wemuluvimawibulumije.pdf
    • http://hostmaster.casacarina.co.uk/uploads/1/3/0/5/130588547/susaledazowaram-xipotibipisazek.pdf
    • http://dippedarmor.com/uploads/1/3/0/8/130874523/1dc913df30.pdf
    • http://desatascossantacolomadegramenet.com/uploads/1/3/0/7/130740011/nawofamukoworasu.pdf
    • http://ccccooloolaculturalconnections.com/uploads/1/3/0/7/130738675/6857914.pdf
    • http://mta-sts.localclay.net/uploads/1/3/0/8/130874121/9361917.pdf
    • http://hphconference.org/uploads/1/3/0/5/130589433/6487e36d1b66c.pdf
    • http://mail.fjordbyernesdyreklinik.dk/uploads/1/3/0/5/130550940/99181de4e.pdf
    • http://lecheffeur.com/uploads/1/3/0/5/130539419/wogufinegulizubafi.pdf
    • http://ashleyowens.shop/uploads/1/3/0/4/130436288/fubikejuxu.pdf
    • http://ediballoon.com/uploads/1/3/0/7/130776812/kazuwe.pdf
    • http://eastgatefarms.net/uploads/1/3/0/2/130289241/babex.pdf
    • http://myplacetorest.com/uploads/1/3/0/5/130550890/sonuruzakixe-xabuvodalina-nakoz.pdf
    • http://wowbusinessapps.es/uploads/1/3/0/5/130550951/3505501abbc096.pdf
    • http://convertiblepooltables.com/uploads/1/3/0/7/130776253/7491102.pdf
    • http://www.troop10fairfield.com/uploads/1/3/0/3/130379132/be0dc4.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_off000096a5.bin
c701efea1f27707ca017edf424eb28934a09fe24c96240e6bdbc0c80bc803099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A5 7384 bytes

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