Malicious PDF — malware analysis report

Static analysis result for SHA-256 228ea6d532da0de7…

MALICIOUS

PDF

76.6 KB Created: 2020-03-20 06:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: c7561e70f50acbb9eb801fd5c24aaeca SHA-1: b155f743137f1d5ab6f57d170448a3e20b48f8bd SHA-256: 228ea6d532da0de7cd081828b3f0b9bec08a60abb8a657a32f7cd47117a40493
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 poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to essay writing. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially unrelated domains supports this assessment. 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://timeframingconsulting.com/uploads/1/3/0/7/130775145/130775145.html#como+elaborar+un+ensayo+en+ingles PDF link annotation
    • http://spearheadvison.com/uploads/1/3/0/6/130639867/labatupigipem_zalunuza.pdfIn PDF document text
    • http://met-wilderwood.com/uploads/1/3/0/8/130873855/78d9c9bf136.pdfIn PDF document text
    • http://onlineestateagentz.com/uploads/1/3/0/7/130739705/48219ec6586c24.pdfIn PDF document text
    • http://amakerssoul.com/uploads/1/3/0/2/130289809/xigek-bagulototawed-sitar.pdfIn PDF document text
    • http://www.alittlegreene.com/uploads/1/3/1/1/131163981/2842761.pdfIn PDF document text
    • http://westernhillschristianchurchnj.org/uploads/1/3/0/7/130776874/zibipipadud.pdfIn PDF document text
    • http://wikihedge.com/uploads/1/3/0/2/130289282/niludonabosenoj_fesupovarogi_zedifemarase.pdfIn PDF document text
    • http://www.thedenabilene.com/uploads/1/3/0/5/130551656/xixis-sanifetelenom-disovipularumo.pdfIn PDF document text
    • http://www.airporttransferswindon.co.uk/uploads/1/3/0/2/130288380/664ed1f61.pdfIn PDF document text
    • http://pijuanandassociates.com/uploads/1/3/0/5/130588928/9838875.pdfIn PDF document text
    • http://lakewoodglen.com/uploads/1/3/0/2/130270996/rajepolibeg.pdfIn PDF document text
    • http://2cc.tv/uploads/1/3/0/5/130539427/2663356.pdfIn PDF document text
    • http://bubblepartieskansas.com/uploads/1/3/0/3/130323928/kozulusuwomejexelax.pdfIn PDF document text
    • http://mail.panterracoach.com/uploads/1/3/0/5/130551512/60961.pdfIn PDF document text
    • http://www.metropolitote.com/uploads/1/3/0/7/130775859/zozigirikexa_tiwevikagutupil.pdfIn PDF document text
    • http://supercarnetwork.net/uploads/1/3/0/5/130551014/jebipirusogera-tuvonikov.pdfIn PDF document text
    • http://www.inspiredbyashley.com/uploads/1/3/0/6/130639811/dorakom.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: cjentzart.com 7 samples

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 9748 bytes
SHA-256: ff982c58e1c8925d251555c14e1bc1c0fad48d0e301fa2001ce71c03ccc79f09
font_01_sfnt_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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