Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc6795968a16ddf…

MALICIOUS

PDF

37.0 KB Created: 2020-05-23 05:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 434613c79f027f35efef16795db9ca5e SHA-1: 1253765efa3487b479379a4f4fa900bb01ad4808 SHA-256: 7dc6795968a16ddf4dd995aca283d929b5ce62f634839bf76e383dd1b4751d9a
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or SEO spam, containing a large number of external links to various websites. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links suggests an attempt to manipulate search engine rankings or redirect users to potentially harmful content. No scripts were extracted, but the sheer volume of outbound links is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mindfultherapyllc.org/uploads/1/3/1/6/131607733/131607733.html#motif+examples+in+movies PDF link annotation
    • http://craftsmanmarketing.com/uploads/1/3/0/8/130873907/valabavojixuwok-zudejazej-sipewib-tamuziwavi.pdfIn PDF document text
    • http://jacksonroasters.com/uploads/1/3/0/8/130874213/2199273.pdfIn PDF document text
    • http://hiresoflo.org/uploads/1/3/0/4/130489240/wekozedabimeginejik.pdfIn PDF document text
    • http://deniserennomixedupmedia.com/uploads/1/3/0/7/130775610/wawikafasigoz_jaxolet_befutofu_torul.pdfIn PDF document text
    • http://ethans-clubhouse.net/uploads/1/3/0/4/130488875/mizepajen-betojojel-wujub-xuzegeji.pdfIn PDF document text
    • http://colordesignmethods.com/uploads/1/3/0/4/130488889/xanam.pdfIn PDF document text
    • http://joanturner.org/uploads/1/3/0/7/130775169/0c368a5a11c91.pdfIn PDF document text
    • http://dreamexdrywallsolutions.com/uploads/1/3/0/5/130546432/kuzinane.pdfIn PDF document text
    • http://nesgoda.org/uploads/1/3/1/4/131455398/loluvuximokozuw_dajebabedezepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 10484 bytes
SHA-256: aad20a3a603283932ec2e55093af67bb34c1a708f2de2b4626f41c241f4b4870