Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb8d69b15ddc6bd…

MALICIOUS

PDF

47.2 KB Created: 2020-03-15 15:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 999520cec62df602269fa2acf28f359e SHA-1: 676c1a344c9cf416c2aee524b0db50ea9be63c08 SHA-256: 9bb8d69b15ddc6bd77505368457af4a4618a20f240e14f76c7fe129b815a198b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also flagged this PDF as malicious. The document body contains a seemingly innocuous title along with the PDF generation tool information, but the primary malicious activity appears to be the distribution of numerous external links, likely to distribute malware or engage in SEO spam.

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://host209.carmichaelnl.com/uploads/1/3/1/0/131070971/131070971.html#good+morning+photos++hd+free+2019 PDF link annotation
    • http://serveathon.net/uploads/1/3/0/5/130551526/wiluxirigesobelalipa.pdfIn PDF document text
    • http://mississippi-ted.com/uploads/1/3/0/2/130291358/rewaratifo.pdfIn PDF document text
    • http://forgelouisville.net/uploads/1/3/0/2/130271031/daxujusipu.pdfIn PDF document text
    • http://zerbuki.space/uploads/1/3/0/4/130476143/wodoto_komipag_tubamaxa.pdfIn PDF document text
    • http://thefamilyfunband.com/uploads/1/3/0/7/130776571/ac9617f12.pdfIn PDF document text
    • http://www.cambridgelocksmithservice.co.uk/uploads/1/3/0/7/130776331/gokevo-rurixemiso-dajexoma-zekip.pdfIn PDF document text
    • http://turnerfamilynz.com/uploads/1/3/0/7/130775009/1405138.pdfIn PDF document text
    • http://maritimeinsurancebroker.net/uploads/1/3/0/4/130477468/tigiwepoz.pdfIn PDF document text
    • http://abigail-smith-illustration.co.uk/uploads/1/3/0/7/130738994/saxubirar.pdfIn PDF document text
    • http://tennisbuddy4u.org/uploads/1/3/0/4/130483086/e636c51558258f.pdfIn PDF document text
    • http://stbrendansreds.com/uploads/1/3/0/6/130604476/kunupap.pdfIn PDF document text
    • http://coastalequipmentrental.org/uploads/1/3/0/3/130313114/fufewikugemo-sejabalod.pdfIn PDF document text
    • http://surfbeat.com/uploads/1/3/0/5/130542859/nezisuravan_pozetalubixava.pdfIn PDF document text
    • http://www.peakscentre.com/uploads/1/3/0/5/130551143/6562177.pdfIn PDF document text
    • http://www.hightribecannabis.com/uploads/1/3/0/7/130738874/c58abe58dc.pdfIn PDF document text
    • http://brickartist.shop/uploads/1/3/0/8/130813497/lapupi.pdfIn PDF document text
    • http://www.ccitpl.com/uploads/1/3/0/5/130544138/wogeginagademek.pdfIn PDF document text
    • http://lawyerforathletes.com/uploads/1/3/0/4/130483295/vekazaboju_nolodi_womerinurudu_lonuresikis.pdfIn PDF document text
    • http://josephineshaw.com/uploads/1/3/0/3/130313213/tavudotepef.pdfIn PDF document text
    • http://mimismushrooms.com/uploads/1/3/0/6/130603836/vuperedivu_xorud_tipotizowujibo_bitowaziparaguz.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

Related samples 3

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_off00007bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDD 7768 bytes
SHA-256: cd1ff72a969b8caec6707986e4418465ec96ccc1129c3fe6debefcc69960d191
font_01_sfnt_off00009a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A09 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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