Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9f9093d0377e05…

MALICIOUS

PDF

47.6 KB Created: 2020-06-06 03:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9b276d973372526592545122fc60448 SHA-1: 6aed4357cde350b60c611026d4fb3698ad1e81c7 SHA-256: 9d9f9093d0377e05492cdcf256489797c8cbe7ea1bd57e1a37dacee4de39398c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious with high confidence. It contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to artificially boost search engine rankings. One of the embedded URLs, http://eo90w.bpmtc.com/uploads/1/3/0/7/130776082/130776082.html#philippe+sollers+david+joyaux, is directly referenced in the document's metadata and appears to be the primary lure. The presence of numerous similar PDF files hosted on various domains suggests a coordinated effort to distribute malicious content or redirect users to phishing sites.

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://eo90w.bpmtc.com/uploads/1/3/0/7/130776082/130776082.html#philippe+sollers+david+joyaux
    • http://theseabreezetavern.com/uploads/1/3/1/4/131410597/kegajajowo.pdf
    • http://mail.saintrobinson.nl/uploads/1/3/0/5/130542875/pemow_rikozanik_derofugenaje_bovosebiwu.pdf
    • http://travellingmadeeasy.com.au/uploads/1/3/1/6/131636972/8c956c181f3969.pdf
    • http://maniacgirls.com/uploads/1/3/0/6/130621244/1825f7cfac2fa09.pdf
    • http://thechosenwon.com/uploads/1/3/0/4/130488399/xerojo-garirubonon-keregir-guwananeku.pdf
    • http://nationalcomediansguild.com/uploads/1/3/0/6/130621354/9939060.pdf
    • http://diamonddrivewaysandpatios.com/uploads/1/3/1/4/131407102/jovaxepatuxeteberel.pdf
    • http://cgrp2013.com/uploads/1/3/1/0/131069935/291f47f25.pdf
    • http://electannmariejohnson.com/uploads/1/3/0/7/130776518/xabowuwopi-pubibilutenaful.pdf
    • http://childrensbhc.com/uploads/1/3/1/6/131607866/kigog-nimufifatunupes.pdf
    • http://borderpatrol100.com/uploads/1/3/0/7/130776245/fotakanavixofuki.pdf
    • http://eo90w.bpmtc.com/uploads/1/3/0/7/130776082/terms.html
    • http://eo90w.bpmtc.com/uploads/1/3/0/7/130776082/dmca.html
    • http://eo90w.bpmtc.com/uploads/1/3/0/7/130776082/policy.html
    • https://wobuzitij.files.wordpress.com/2020/06/68894428916.pdf
    • https://wisixabapux.files.wordpress.com/2020/06/zuvakulezijagaxetimaki.pdf
    • https://zikusale.files.wordpress.com/2020/06/98555613532.pdf
    • https://gujubajiwija.files.wordpress.com/2020/06/mewogogenumujudazofokifi.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_off00008817.bin
0bd081acb56f2184c2c44d1630742bd5afd81237586b7e2e16a7bbd05f752c37
pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 13384 bytes