Malicious PDF — malware analysis report

Static analysis result for SHA-256 5799182e2da04067…

MALICIOUS

PDF

54.0 KB Created: 2020-05-15 19:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4defad2a180d045acbde8f32b4b1f083 SHA-1: bd2deed293eb207338f15684b6b298ba0c24fe51 SHA-256: 5799182e2da040672132aa2a06d3fa360c8c138db7156892be7cb419e86d514c
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, suggesting a link farm or SEO spamming technique. The heuristic 'PDF_SEO_LINK_FARM' indicates that the PDF is designed to host numerous links to other PDF files, likely for SEO manipulation or to distribute malicious content. The embedded URLs point to various domains, all structured similarly, reinforcing the link farm hypothesis. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://blacklocustpastures.com/uploads/1/3/0/5/130544001/130544001.html#maths+symbols+pdf PDF link annotation
    • http://deana1.com/uploads/1/3/0/5/130551534/guvexofufawimo-fonotabila.pdfIn PDF document text
    • http://andreasalgava.com/uploads/1/3/0/8/130873860/9365503.pdfIn PDF document text
    • http://win27.org/uploads/1/3/0/6/130621142/ae3b35b.pdfIn PDF document text
    • http://theheardoc.com/uploads/1/3/1/3/131379792/vorov.pdfIn PDF document text
    • http://daalcare.com/uploads/1/3/1/4/131410399/niluv.pdfIn PDF document text
    • http://kinkshairwinchmorehill.com/uploads/1/3/1/6/131637247/nifutatez.pdfIn PDF document text
    • http://mymoledro.com/uploads/1/3/1/4/131406154/rivitija.pdfIn PDF document text
    • http://latitudefun.com/uploads/1/3/0/8/130874672/zogosaxogezobo_gujofo.pdfIn PDF document text
    • http://tivabox.com/uploads/1/3/1/4/131407300/niwefopilewa.pdfIn PDF document text
    • http://ourladywillowbrook.com/uploads/1/3/0/7/130738707/3665901.pdfIn PDF document text
    • http://theiamcampaign.com/uploads/1/3/1/4/131407945/7507334.pdfIn PDF document text
    • http://claysmithwrites.com/uploads/1/3/1/3/131380894/kikeboju-wigogosad.pdfIn PDF document text
    • http://judydang.com/uploads/1/3/0/4/130435597/pipebodewadifo.pdfIn PDF document text
    • http://propertymanagerfinder.com/uploads/1/3/0/7/130776142/9642171.pdfIn PDF document text
    • http://faithfinancialpartners.net/uploads/1/3/1/8/131871912/migisumiwodebodegef.pdfIn PDF document text
    • http://ultragaragedoors.net/uploads/1/3/0/8/130873738/pavegugodet.pdfIn PDF document text
    • http://kathrynbrown.info/uploads/1/3/1/8/131871690/8386357.pdfIn PDF document text
    • http://jackdoddadvertising.com/uploads/1/3/0/8/130813906/zujunegi_kufuvugiki_fafulisumawe_jamaxolir.pdfIn PDF document text
    • http://northwestoksurvivalswim.com/uploads/1/3/0/6/130639418/71a6fa8347a1f.pdfIn PDF document text
    • http://servathonhk.com/uploads/1/3/0/2/130291489/notorerunixup.pdfIn PDF document text
    • http://clinnovations-lb.com/uploads/1/3/1/3/131380612/filulajikuxanipogi.pdfIn PDF document text
    • http://crossthelinestudios.com/uploads/1/3/0/2/130287835/3132271.pdfIn PDF document text
    • http://chelmermedics.com/uploads/1/3/0/3/130379902/6915387.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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_off00006e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 20144 bytes
SHA-256: b07394626b6a291f61b75210d4d994718137869abe584ef8bea563cc763e0043
font_01_sfnt_off0000af03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF03 19124 bytes
SHA-256: 4d7ba4db3ad18ee354b2dcb521363eae1285378f0288fc6c7cd0299605a3f3f0

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