Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb86bc68b2645650…

MALICIOUS

PDF

42.6 KB Created: 2020-06-08 16:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b925a701fb221f07bcd34ebbb21e674c SHA-1: d494420df4f0988ce745e7aa8d18c6aaba58b3d9 SHA-256: fb86bc68b2645650a99267e137682d7bbfa6ae31afc1d4f1a23dfb577e89e866
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. The document body text, though partially corrupted, includes a URL that matches one of the extracted links. This suggests the primary purpose is to redirect users to a network of websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jewels-hair-studio.com/uploads/1/3/0/4/130488399/130488399.html#davul+zurnal%25C4%25B1+oyun+havalar%25C4%25B1+adana+mp3+indir PDF link annotation
    • http://beaverdam.club/uploads/1/3/1/6/131608017/boxifivojol-rikeruje-lujepom-roxexinogefub.pdfIn PDF document text
    • http://commonson90.com/uploads/1/3/0/3/130379147/kefagutene_foken.pdfIn PDF document text
    • http://mta-sts.mail.nicolemessina.com/uploads/1/3/0/6/130604950/732fa.pdfIn PDF document text
    • http://thelocalreview.org/uploads/1/3/0/7/130738943/vesajiw.pdfIn PDF document text
    • http://rosesandrivets.com/uploads/1/3/1/6/131637099/5a8d36ee2d.pdfIn PDF document text
    • http://2l.undesirable.us/uploads/1/3/1/4/131452949/puzokakevo.pdfIn PDF document text
    • http://mjmtalentliteraryagents.org/uploads/1/3/0/5/130541077/dunewuxo.pdfIn PDF document text
    • http://eagcpa.org/uploads/1/3/0/3/130323635/8063971.pdfIn PDF document text
    • http://michaelmcgehee.org/uploads/1/3/0/3/130312976/6db7f8bfab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tirokixut.files.wordpress.com/2020/06/76472948129.pdfIn PDF document text
    • https://kepedizav.files.wordpress.com/2020/06/78069694454.pdfIn PDF document text
    • https://puladobino.files.wordpress.com/2020/06/jatanorev.pdfIn PDF document text
    • https://gilogekef.files.wordpress.com/2020/06/bupidefipelalupomuzuk.pdfIn PDF document text
    • https://zivurun.files.wordpress.com/2020/06/fakidos.pdfIn PDF document text
    • https://sinezuve.files.wordpress.com/2020/06/40764145642.pdfIn PDF document text
    • https://wofopisuf.files.wordpress.com/2020/06/savufekedazupofoli.pdfIn PDF document text
    • https://jatawip.files.wordpress.com/2020/06/79367819412.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 8

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_off00004c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C46 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off00005d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 12572 bytes
SHA-256: fea6c2324a3378de9e2b569a32838526473f13a12ec0f31546b83b3e3e873faa
font_02_sfnt_off000084a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A3 16628 bytes
SHA-256: 7059bc408ce191f03f3147e35571938330f85f3642963be1ebc17a5d7d31dc93

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