Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3ceffb7513b2c9…

MALICIOUS

PDF

45.6 KB Created: 2020-03-30 21:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 72a56f34aa69b75a694f2576a1542084 SHA-1: 919fc9b1d264a459de7fa19a6278ce51f148eb7a SHA-256: 7d3ceffb7513b2c95480fd6d406c78954a72d1e094665b1a3ea665f2df50ea56
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the heuristic for a 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a potential for JavaScript execution or redirection to 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://endearcare.org/uploads/1/3/0/4/130476976/130476976.html#modelo+magico+religioso+ventajas+y+desventajas PDF link annotation
    • http://jamisonmcdermott.com/uploads/1/3/0/6/130639675/powagevukazafoboset.pdfIn PDF document text
    • http://carrozadosdelnorte.com/uploads/1/3/0/6/130639453/vedifonow-zegav-mivemojedizej.pdfIn PDF document text
    • http://stayatthebank.com/uploads/1/3/0/3/130324030/fbbdf989d155.pdfIn PDF document text
    • http://dynamixhls.com/uploads/1/3/0/2/130271205/8685138.pdfIn PDF document text
    • http://pervading.net/uploads/1/3/0/7/130738921/8a873b.pdfIn PDF document text
    • http://madewithlovebydanielle.com/uploads/1/3/0/7/130775395/wikoturazikixeg-nevoxikix.pdfIn PDF document text
    • http://webdisk.skateestateonline.com/uploads/1/3/0/8/130813899/4261822.pdfIn PDF document text
    • http://eatatvivianscafe.com/uploads/1/3/1/3/131398036/jogatatesad.pdfIn PDF document text
    • http://springbartent.com/uploads/1/3/1/0/131069750/8515877.pdfIn PDF document text
    • http://globalmemberacademy.net/uploads/1/3/1/0/131070398/rijavologedakeri.pdfIn PDF document text
    • http://cloutfm.com/uploads/1/3/0/6/130603737/bewuvofalatop-bijuwajirug-towexibotibavof-sorepewogisu.pdfIn 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
🗂 Part of campaign: garywallislaw.com 3 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E3 9024 bytes
SHA-256: a7ee16082c9e6564b1913cf75e3dd8fc8138b5f0c0e851fa6f1cf52e385d0479