Malicious PDF — malware analysis report

Static analysis result for SHA-256 5565ed5b32b8f56f…

MALICIOUS

PDF

45.0 KB Created: 2020-03-08 10:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ccc38bf510fb749a86dbba3260de3d2a SHA-1: d6661b5a6f4ff867ab990c9c23bc05362fa87f0c SHA-256: 5565ed5b32b8f56f5096dcb89d495b1b615ebc5f016adbb816245a22473b2da3
94 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, contains a title related to setting up an Apple Airport Extreme base station, which is likely a lure to disguise the malicious nature of the PDF. The primary attack pattern involves directing users to a network of external URLs, potentially for SEO manipulation or to host further malicious content.

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://thehappygirlstore.com/uploads/1/3/0/4/130435500/130435500.html#setting+up+an+apple+airport+extreme+base+station
    • http://oxolaxofix.com/uploads/1/3/0/2/130273987/liwajoza-lunubefamen-kazot.pdf
    • http://www.jaunaismuzikalaisteatris.com/uploads/1/3/0/6/130604482/xozesovojogado.pdf
    • http://petlovr.com/uploads/1/3/0/7/130739082/7fa52600d91.pdf
    • http://sparkleandshineshowclothes.ca/uploads/1/3/0/4/130488935/6793f557c1e.pdf
    • http://mein-herzens-weg.com/uploads/1/3/0/2/130272955/750f11b0e989.pdf
    • http://noahguystaffing.com/uploads/1/3/0/4/130489185/6729873.pdf
    • http://nashvillefoodandfun.com/uploads/1/3/0/5/130590308/2559915.pdf
    • http://npcpasolutions.com/uploads/1/3/0/3/130379769/1180149.pdf
    • http://cotic.com.hr/uploads/1/3/0/6/130621225/kuxenadoje.pdf
    • http://iroquoiscountyscholarshipgolfouting.com/uploads/1/3/0/7/130775856/kugubewuzegoro.pdf
    • http://bostonchaptermerch.com/uploads/1/3/0/8/130874516/d53f3816e7c778e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007154.bin
21d7b70bf4e0d9a67c5f71ab4bf829fa5571a9a0781fc038432aaf06007642c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7154 7816 bytes
font_01_sfnt_off00008fe4.bin
9b236abdfbaf9fa3ef239a80ccb9e782aa7f6b4515c8528d7fbe324f36c7b549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE4 16656 bytes

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