Malicious PDF — malware analysis report

Static analysis result for SHA-256 1233fc512cf1bb61…

MALICIOUS

PDF

73.3 KB Created: 2020-03-27 05:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: b6ba29fb4b74734b0a0220a83ea3d695 SHA-1: ca4ad9ba5aa333fd376f28a1fb3d102f9092a0d9 SHA-256: 1233fc512cf1bb61dd434377df4287a65c443a79fe798d8c3e3b53144c629315
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation scheme. The embedded URLs point to various domains, many of which appear to be dynamically generated. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to potentially harmful content or phishing sites.

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://creationsbythebecks.com/uploads/1/3/0/5/130539265/130539265.html#letra+mayuscula+manuscrita PDF link annotation
    • http://jjustonemore.com/uploads/1/3/0/5/130543057/lipebizoxafono_tutiludusura_xivusez_jupevadofosikus.pdfIn PDF document text
    • http://kasiastravelanddive.com/uploads/1/3/0/7/130739971/bujiwex.pdfIn PDF document text
    • http://seodublin.org/uploads/1/3/0/6/130603887/d195f2d574b1cbe.pdfIn PDF document text
    • http://omeri.com/uploads/1/3/0/5/130551654/4493170.pdfIn PDF document text
    • http://4sinclairburkelane.com/uploads/1/3/0/4/130488398/revawerumadenimaxi.pdfIn PDF document text
    • http://mmsmexico.live/uploads/1/3/0/8/130874129/4097436.pdfIn PDF document text
    • http://glassfulgal.com/uploads/1/3/0/3/130313836/9558456.pdfIn PDF document text
    • http://bathsaltheadshop.com/uploads/1/3/0/7/130775741/1b164e3a4843571.pdfIn PDF document text
    • http://mountaintherapygroup.com/uploads/1/3/0/7/130738740/4c42d4beda7f9c7.pdfIn PDF document text
    • http://cargotrailershouston.com/uploads/1/3/0/9/130969699/2e6e3f4a9e5.pdfIn PDF document text
    • http://saveanurse.net/uploads/1/3/0/8/130814293/4753573.pdfIn PDF document text
    • http://volantmarina.com/uploads/1/3/0/8/130814009/6528529.pdfIn PDF document text
    • http://hostmaster.midsuffolkpetcare.co.uk/uploads/1/3/0/7/130738921/a4a5c4bde77a.pdfIn PDF document text
    • http://sammyb.online/uploads/1/3/0/5/130588503/bovegi-sanavotanetit-nuzazuj.pdfIn PDF document text
    • http://nangrayphotography.com/uploads/1/3/0/6/130620646/fajumilijukudi-jogupuxoj-bizifav-tikezolawip.pdfIn PDF document text
    • http://madeiradrywall.com/uploads/1/3/0/3/130323281/b1bdc.pdfIn PDF document text
    • http://thisisallisonlee.com/uploads/1/3/0/6/130604682/kevol.pdfIn PDF document text
    • http://drstellamedicalintuitive.com/uploads/1/3/0/6/130604522/6ca196d6d6514ed.pdfIn PDF document text
    • http://iconmobilesolutions.com/uploads/1/3/0/6/130620898/lopotawawetoz.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
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8C 11276 bytes
SHA-256: 14f6074cf93756ef0addbbdb326aa360e66ca7d9df48679b9d1a75f078e4ac20
font_01_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 4112 bytes
SHA-256: f1f4ab39651a75e636fcf3fe469f3fb81cfad50e4d787ccb23f7d3fe133f6c08
font_02_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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