Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab70391e483f09b…

MALICIOUS

PDF

36.4 KB Created: 2020-06-05 16:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e84c620996175cd3ab015bc098deae95 SHA-1: cc5255a2c5ed427fe34a5bf53ba18449828cbcc1 SHA-256: 8ab70391e483f09b59707a1c568609590b94cbbd29006e9182c6453ed50a863f
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs point to various domains, suggesting a link farm or distribution network. No scripts were extracted from this sample, but the sheer volume of outbound links is highly suspicious.

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://emergedesign-ak.com/uploads/1/3/0/7/130776687/130776687.html#airsoft+spring+guide
    • http://casaverandadark.devsite-1.com/uploads/1/3/0/6/130622047/fa3af5aaf8a1e.pdf
    • http://freebies4baby.net/uploads/1/3/0/5/130550993/gubenim-wusasuvilotifes.pdf
    • http://synchronyleds.us/uploads/1/3/0/6/130621337/3756778.pdf
    • http://noreply-27.info/uploads/1/3/0/7/130738946/xeveladawuwesole.pdf
    • http://sharsmetalart.com/uploads/1/3/1/3/131381101/lesupogikudil.pdf
    • http://mail.dancestepsstudio.com/uploads/1/3/0/9/130969260/runuzazarukija.pdf
    • http://mta-sts.mail.13rays.org/uploads/1/3/0/7/130739970/vunemizenadov-juwasoke.pdf
    • http://jbrandwagyu.com/uploads/1/3/0/7/130740015/wogazekorov.pdf
    • http://sportsandfitnesssolutions.com/uploads/1/3/0/4/130488446/bfdf0e54aad1a5.pdf
    • http://leosart.de/uploads/1/3/1/4/131408024/wipugilavunatedoxuxi.pdf
    • http://leilajadelevi.com/uploads/1/3/0/8/130874021/gebupewebutabakowan.pdf
    • http://emergedesign-ak.com/uploads/1/3/0/7/130776687/terms.html
    • http://emergedesign-ak.com/uploads/1/3/0/7/130776687/dmca.html
    • http://emergedesign-ak.com/uploads/1/3/0/7/130776687/policy.html
    • https://dadinesefefi.files.wordpress.com/2020/06/12265346164.pdf
    • https://lixamajifeki.files.wordpress.com/2020/06/somof.pdf
    • https://welenoxule717983587.files.wordpress.com/2020/06/67241394457.pdf
    • https://xesupul.files.wordpress.com/2020/06/nazededibekajupalifegodib.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_off000060f8.bin
72cbecfd9e4171db266303a7525c5ad3a0051149a462d0b9ffe260452a4bc052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 10896 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.