Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd7db861905e7e6…

MALICIOUS

PDF

39.8 KB Created: 2020-03-07 10:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 9b494a12f1959ef87046c6da679b85b9 SHA-1: 3162155f76de5f0231e5f1896458b080b5b3fa8d SHA-256: ecd7db861905e7e6a87747b5baffe92c7c0cfa804b5190c097a2107e704f6327
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains a URL related to medical information, likely a lure to encourage clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points towards a drive-by download or phishing attempt.

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://vera-b.pleasingfood.com/uploads/1/3/0/6/130639082/130639082.html#what+dosage+of+azithromycin+is+used+to+treat+chlamydia PDF link annotation
    • http://subordominant.com/uploads/1/3/0/5/130540146/dd01b8e47fd.pdfIn PDF document text
    • http://yourmateapparel.com/uploads/1/3/0/5/130551339/godomasezejimed.pdfIn PDF document text
    • http://mizzoureview.com/uploads/1/3/0/5/130550712/3ca640bb1b9383.pdfIn PDF document text
    • http://www.terrazzosampleservice.com/uploads/1/3/0/6/130639854/xefadonegevo.pdfIn PDF document text
    • http://unityphp.com/uploads/1/3/0/2/130271085/1a298f881dcdbf.pdfIn PDF document text
    • http://www.mayalockett.com/uploads/1/3/0/7/130740556/f65a5d.pdfIn PDF document text
    • http://sadeamiarts.com/uploads/1/3/0/6/130639544/4387608.pdfIn PDF document text
    • http://analethics.com/uploads/1/3/0/5/130543272/f7a6ad.pdfIn PDF document text
    • http://showtimesolutions.website/uploads/1/3/0/4/130483924/2060399.pdfIn PDF document text
    • http://dailysteed.com/uploads/1/3/0/6/130621829/nekezaxatamox-ligid-bozonaxigimavo-nukeza.pdfIn PDF document text
    • http://smtp.chezthuy.com/uploads/1/3/0/5/130588244/9947670.pdfIn PDF document text
    • http://mychickenman.com/uploads/1/3/0/5/130551935/filesilevav-fozik-mobukiveloz-vewodemakaraxin.pdfIn PDF document text
    • http://itsallrv.com/uploads/1/3/0/7/130776222/kasare-galune.pdfIn PDF document text
    • http://levipark.co.nz/uploads/1/3/0/7/130739560/02f471f5b5cbaf.pdfIn PDF document text
    • http://24carrotwriting.org/uploads/1/3/0/4/130488338/melijutate.pdfIn PDF document text
    • http://gsptalk.net/uploads/1/3/0/3/130379504/d1d3e48250.pdfIn PDF document text
    • http://9marf.butterfly520.com/uploads/1/3/0/3/130313746/5378842.pdfIn PDF document text
    • http://blitzmastery.com/uploads/1/3/0/8/130874370/filukojafa_regigeg.pdfIn PDF document text
    • http://hostmaster.royallescircus.com/uploads/1/3/0/4/130436141/pigexuzojifefiporumo.pdfIn PDF document text
    • http://micromaxfarms.com/uploads/1/3/0/8/130813055/tapokolu.pdfIn PDF document text
    • http://www.cashshit.us/uploads/1/3/0/5/130551374/c677dbbd85519.pdfIn PDF document text
    • http://lucaandgigi.com/uploads/1/3/0/6/130604590/3c58e45.pdfIn PDF document text
    • http://bargersvilleoverstock.com/uploads/1/3/0/2/130272080/nusubufivido-wufatofivu-bijurir-fuwurubelutip.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 7988 bytes
SHA-256: 25fad4d047e35aadbbb6478da09a6c42f4fb69984573bec5cffc3863bde76153

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