Malicious PDF — malware analysis report

Static analysis result for SHA-256 17df0c24562a6389…

MALICIOUS

PDF

41.1 KB Created: 2020-04-08 10:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7caeb5543b79af4c6ca213ac23d8a007 SHA-1: 8ba974bab0fb00ea6ebc4fa0e71abc59cb67bb04 SHA-256: 17df0c24562a63898fc8229c5d5dac2b6a4fcb535939845a5dc1273c9db2e41b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a PDF SEO link farm. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though corrupted, contains a URL that is also present in the heuristics, suggesting a deliberate attempt to direct users to external resources. The primary purpose appears to be to drive traffic to a network of linked PDFs.

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://laralavenderoils.com/uploads/1/3/1/3/131384300/131384300.html#como+calcular+el+ciclo+menstrual+regular
    • http://crusheenns.net/uploads/1/3/0/8/130814529/9810487.pdf
    • http://waterbikerental.com/uploads/1/3/0/7/130775291/gusozenawog-tonupejod-gogugo.pdf
    • http://interiordecoratorsanddesignancaster.com/uploads/1/3/1/3/131384407/3099905.pdf
    • http://podosekconstruction.com/uploads/1/3/0/7/130739072/gijub-bewisovin-moxipositidilil-vesedulogunux.pdf
    • http://detroitgraffiticleanup.com/uploads/1/3/0/5/130539016/1481653.pdf
    • http://motheringmama.com/uploads/1/3/1/4/131452937/xatisalovepes_widev.pdf
    • http://blackmauproductions.com/uploads/1/3/0/4/130476033/moxex.pdf
    • http://pofcalls-enable.com/uploads/1/3/0/7/130775085/cb8a61899aec48.pdf
    • http://cashlockab.com/uploads/1/3/0/6/130621524/8749268.pdf
    • http://mnhealthoffice.biz/uploads/1/3/0/7/130739363/bamujipiluxu.pdf
    • http://sjwill.com/uploads/1/3/0/5/130589415/6061426.pdf
    • http://dinanrealestateadvisors.com/uploads/1/3/0/6/130620762/gubebetegi.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_off000076dd.bin
923d08e4fc4269fab5816050568cc6e9096e672e9512872f1e1de48535ad14ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 8368 bytes

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