Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37274379d5ba0b2…

MALICIOUS

PDF

36.7 KB Created: 2020-03-09 05:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 132b87432096d5f1db981a405f98d701 SHA-1: 57d888588917198c90a82b4171dfb0f5015af0cc SHA-256: c37274379d5ba0b2713a67323388b4f642eb0b0142e2ffa50e84a70efd46fcc3
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary purpose is to direct users to a network of external sites, potentially for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://host2.creativedatainc.com/uploads/1/3/0/4/130435500/130435500.html#como+pasar+un+archivo+pdf+a+excel+en+linea
    • http://mta-sts.mx.threesisterswillowglen.com/uploads/1/3/0/6/130604129/bufatetat.pdf
    • http://shcdesignsllc.com/uploads/1/3/0/7/130776578/c8d0f5f7848fa71.pdf
    • http://en.techsecosrl.com/uploads/1/3/0/6/130603836/e046515c82c.pdf
    • http://noxonroadpta.com/uploads/1/3/0/5/130551775/vobedivod.pdf
    • http://stcjrp.com/uploads/1/3/0/6/130603827/bowagajulax.pdf
    • http://www.mytjscatering.com/uploads/1/3/0/8/130873987/ee2f6.pdf
    • http://www.drpattymain.com/uploads/1/3/0/2/130288532/tadubobujamiz_jepuwexef_gezozizoze.pdf
    • http://rockymtbernedoodles.com/uploads/1/3/0/3/130379075/kuzaja-zalakuvanekar.pdf
    • http://brooklyn2burbs.com/uploads/1/3/0/4/130488169/1dd790.pdf
    • http://starkeyhomes.net/uploads/1/3/0/7/130776399/83bb30e0e.pdf
    • http://ieibr.com/uploads/1/3/0/2/130270746/b8f9588ac34.pdf
    • http://austin-lackey.com/uploads/1/3/0/7/130775248/ratufuroz.pdf
    • http://www.skincarebytaylor.info/uploads/1/3/0/5/130538992/6133028.pdf
    • http://www.atconcreteinc.com/uploads/1/3/0/9/130968993/rotopeb.pdf
    • http://mta-sts.mail.scmnaturematters.net/uploads/1/3/0/5/130588620/satobevavepuxamamu.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_off000061dd.bin
cde263dc989b0fa7234d9a56febe21f046a05a3d578b0ed28b6e8297d6976338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 9324 bytes

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