Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6acdec7788c389…

MALICIOUS

PDF

37.2 KB Created: 2020-03-25 14:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 40b6b0e3d0bc90a53bc1b0c655edd519 SHA-1: dac22de2e65e87e226f7b60960b31b9b65bb027f SHA-256: 2d6acdec7788c389669796d505ecc24136bfe2389444d8e988a6e28ed02000d5
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to distribute or host further malicious content. The document body contains a seemingly innocuous title but is heavily obfuscated, suggesting the primary purpose is not content delivery but rather the embedded links.

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://muzikataviemsvetkiem.com/uploads/1/3/1/3/131384555/131384555.html#letra+de+la+cancion+catolica+danos+un+corazon+grande+para+amar PDF link annotation
    • http://donate.shieldedhearts.org/uploads/1/3/0/7/130776370/tegalejemirinu.pdfIn PDF document text
    • http://millerjohnsonmedia.com/uploads/1/3/0/6/130621700/c7d129dc.pdfIn PDF document text
    • http://ruralfirecomps.com/uploads/1/3/0/6/130604882/xefekizilid.pdfIn PDF document text
    • http://vinculum.info/uploads/1/3/0/5/130539309/8f3f06b5a5.pdfIn PDF document text
    • http://elevatetutoring.com/uploads/1/3/0/6/130620887/wakulabuta_bokewixetedezap_nexakowefe_puxuvuzoken.pdfIn PDF document text
    • http://craftchampion.com/uploads/1/3/0/4/130489564/kunofepigidi.pdfIn PDF document text
    • http://daycareinsanrafael.com/uploads/1/3/0/7/130740612/784b3376e0b9c37.pdfIn PDF document text
    • http://cpanel.sheknowsadventure.com/uploads/1/3/0/3/130313183/1722987.pdfIn PDF document text
    • http://canvasbykatie.com/uploads/1/3/0/7/130776500/kewus.pdfIn PDF document text
    • http://www.rfwhilephotos.com/uploads/1/3/0/8/130874591/4bf73.pdfIn PDF document text
    • http://nishinlodge.com/uploads/1/3/0/2/130289580/xotonesemomigu.pdfIn PDF document text
    • http://longtermemergencyfoodsupply.com/uploads/1/3/0/6/130604636/takajawofuwuvezor.pdfIn PDF document text
    • http://sjvschoolbr.org/uploads/1/3/0/5/130588845/ruxoj_maxutadu_moduwaraw_mewisuj.pdfIn PDF document text
    • http://mylenechoquette.com/uploads/1/3/0/5/130590273/torisagik.pdfIn PDF document text
    • http://youngscientistsandinnovators.com/uploads/1/3/0/4/130436141/020afccd6fe3df6.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 9884 bytes
SHA-256: bdcd1fc158dfad92e96798cb1f5e78ab411edf7ceae2efcfc118121dfc3faeca