Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91b0bfb3ce1fe36…

MALICIOUS

PDF

89.9 KB Created: 2020-03-07 12:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 78613a8962b5093cde0ce2646efea278 SHA-1: 10b1fd9e7b89438e4fc7666f26f8bca3b46ac97d SHA-256: b91b0bfb3ce1fe3692e53f7e5b92e68ca3ccfdc3a0a586fe363efd5f0a97221b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution T1566.002 Phishing: Spearphishing Attachment T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands. The document also contains a large number of external links, suggesting it is part of a link farm designed to host malicious content. The primary intent appears to be the download and execution of a second-stage payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://aiboyule.br3h.com/uploads/1/3/0/2/130271030/130271030.html#why+does+my+adobe+acrobat+xi+keeps+crashing PDF link annotation
    • http://clogdance.net/uploads/1/3/0/5/130543766/37c34ed675f6255.pdfIn PDF document text
    • http://dirtkingsrc.com/uploads/1/3/0/5/130551023/9fa5c32611441.pdfIn PDF document text
    • http://ourlibertypark.net/uploads/1/3/0/6/130604458/95b9197bb6a11af.pdfIn PDF document text
    • http://replicationsystems.com/uploads/1/3/0/2/130289238/zigizasexu.pdfIn PDF document text
    • http://serenityasheville.com/uploads/1/3/0/6/130620314/sajibapuwufurad_nijexumotikit.pdfIn PDF document text
    • http://pilotprojects.net/uploads/1/3/0/6/130605001/xarojenov_fiwabujamawo.pdfIn PDF document text
    • http://evntrs.com/uploads/1/3/0/2/130288559/goxanum.pdfIn PDF document text
    • http://mail.chadwickandigor.com/uploads/1/3/0/2/130271017/9be963de0c5c7.pdfIn PDF document text
    • http://atbadvisers.com/uploads/1/3/0/7/130740264/738778.pdfIn PDF document text
    • http://lashesbyjasminevanessa.com/uploads/1/3/0/5/130539987/nizeteledu.pdfIn PDF document text
    • http://riskmarcadvisors.net/uploads/1/3/0/7/130738814/piponodugozo.pdfIn PDF document text
    • http://www.enscarved.com/uploads/1/3/0/6/130639162/venoru.pdfIn PDF document text
    • http://www.cicchiservizi.com/uploads/1/3/0/8/130874410/tagumaneba.pdfIn PDF document text
    • http://mta-sts.mail.duckdog.at/uploads/1/3/0/2/130289772/5271805.pdfIn PDF document text
    • http://firezoneschaumburg.com/uploads/1/3/0/4/130476743/7604549.pdfIn PDF document text
    • http://www.420dispensaryokc.net/uploads/1/3/0/3/130324170/279546.pdfIn PDF document text
    • http://tribaninvestments.com/uploads/1/3/0/5/130551124/tizudokupuli-puvew.pdfIn PDF document text
    • http://franquiciafuxion.com/uploads/1/3/0/4/130479435/rafunaji.pdfIn PDF document text
    • http://automaticpocketdoor.com/uploads/1/3/0/6/130620852/dowudub-zegomaraxo-rilem-vobesufizimuno.pdfIn PDF document text
    • http://thebesticecreamandcoffeesolvang.com/uploads/1/3/0/6/130639503/puzepafemepe_vawavojujasu.pdfIn PDF document text
    • http://taobaomiaoshaqizenmeshiyong.thesurge.cc/uploads/1/3/0/3/130323632/dominijipu-kegabuki.pdfIn PDF document text
    • http://www.pureromancewizardofoz.com/uploads/1/3/0/9/130969211/dixolasixe-jawujuraz.pdfIn PDF document text
    • http://www.forever-changed.com/uploads/1/3/0/6/130639246/b2d6c26511.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 1

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_off0001373a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373A 8680 bytes
SHA-256: e310225ccda6f7de822ecbbafa4822a090f4c3bfac34ce727b39e025122f41d6

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